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A quintillion is equal to 1018 in the short scale, or 1030 in the long scale.[1][2]

Written out in decimal form quintillion (in the short scale) is:

1000000000000000000

In long scale:

1000000000000000000000000000000

This number is also called hexillion in Russ Rowlett's Greek-based naming system.[3]

Aarex Tiaokhiao calls this number hetillion.[4] He also gave name ocdoocol and 18-noogol, referring to the short scale value of this number.[5]

Wikia user NumLynx gave the name sexasand for this number's short scale value.[6]

Nicolas Chuquet coined tryllion for 1018 (not to be confused with 1032), according to the Triparty en la science des nombres, which was previously lost and not rediscovered until 1880. [7][8] Later it became trillion in long scale.


Decimal[]

Examples[]

  • Niagara Falls takes up 210,000 years (about 30 times all recorded history) to use up a quintillion gallons of water.
  • A single drop of water contains 1.7 quintillion water molecules.
  • The distance from the Milky way to Andromeda is 2 million light years, which is about 11.73 quintillion miles or 18.877 quintillion kilometers.
  • The entire Earth contains about 326 quintillion gallons of water.[9]
  • There are about 43.3 quintillion ways to arrange a 3×3×3 Rubik's Cube.[10]
  • The SI prefix exa- multiplies by one quintillion.
  • The Earth's cross section has an area of about 1.275 quintillion square centimeters. [11]
  • By one estimate, there are 20 quintillion living animals on Earth.[12]
  • a tower of a quintillion one dollar bills would aproximately measure 1.099*10^20m in height.
  • The half-life of Bismuth-209 is approximately 20 quintillion years.

As a banknote denomination[]

Only the Hungarian pengő had banknotes with this number in the denomination.

Approximations[]

For short scale:

Notation Lower bound Upper bound
Scientific notation \(1\times10^{18}\)
Arrow notation \(10\uparrow18\)
Steinhaus-Moser Notation 15[3] 16[3]
Copy notation 9[18] 1[19]
Taro's multivariable Ackermann function A(3,56) A(3,57)
Pound-Star Notation #*(4,1,3)*6 #*(3,1)*13
BEAF {10,18}
Hyper-E notation E18
Bashicu matrix system (0)(0)[31622] (0)(0)[31623]
Hyperfactorial array notation 19! 20!
Fast-growing hierarchy \(f_2(54)\) \(f_2(55)\)
Hardy hierarchy \(H_{\omega^2}(54)\) \(H_{\omega^2}(55)\)
Slow-growing hierarchy \(g_{\omega^{\omega+8}}(10)\)

For long scale:

Notation Lower bound Upper bound
Scientific notation \(1\times10^{30}\)
Arrow notation \(10\uparrow30\)
Steinhaus-Moser Notation 22[3] 23[3]
Copy notation 9[30] 1[31]
Taro's multivariable Ackermann function A(3,96) A(3,97)
Pound-Star Notation #*(9,6,4)*9 #*(0,1,0,0,1)*5
BEAF {10,30}
Hyper-E notation E30
Bashicu matrix system (0)(0)(0)[5623] (0)(0)(0)[5624]
Hyperfactorial array notation 28! 29!
Fast-growing hierarchy \(f_2(93)\) \(f_2(94)\)
Hardy hierarchy \(H_{\omega^2}(93)\) \(H_{\omega^2}(94)\)
Slow-growing hierarchy \(g_{\omega^{\omega3}}(10)\)

Gallery[]

Sources[]

See also[]

Main article: -illion
1–9: million · billion · trillion · quadr · quint · sext · sept · oct · non
10–19: decillion · undec · duodec · tredec · quattuordec · quindec · sexdec · septendec · octodec · novemdec
20–29: vigintillion · unvigint · duovigint · tresvigint · quattuorvigint · quinvigint · sesvigint · septemvigint · octovigint · novemvigint
30–39: trigintillion (un- · duo- · tres- · quattuor- · quin- · ses- · septen- · octo- · noven-)
40–49: quadragintillion (un- · duo- · tres- · quattuor- · quin- · ses- · septen- · octo- · noven-)
50–59: quinquagintillion (un- · duo- · tres- · quattuor- · quin- · ses- · septen- · octo- · noven-)
60–69: sexagintillion (un- · duo- · tre- · quattuor- · quin- · se- · septen- · octo- · noven-)
70–79: septuagintillion (un- · duo- · tre- · quattuor- · quin- · se- · septen- · octo- · noven-)
80–89: octogintillion (un- · duo- · tres- · quattuor- · quin- · sex- · septem- · octo- · novem-)
90–99: nonagintillion (un- · duo- · tre- · quattuor- · quin- · se- · septe- · octo- · nove-)
100–900: centillion · ducent · trecent · quadringent · quingent · sescent · septingent · octingent · nongent
1,000–1024: millillion · dumill · dumillinonagintanongent · trimill · trimilliduotrigintatrecent · trimillisexoctogintaoctingent · quadrimill · quadrimilliquattuordecicent · quinmill · sexmill · septimill · octimill · nonimill · myr · decimilliquinsexagintasescent · dumyr · unquadragintamilliunquinquagintacent · centimill · micr · nan · pic · femt · att · zept · yoct
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