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This page is about -yllion's definition. For the alternative definition, see trillion.

Byllion is equal to \(10^{16}\) in the -yllion system[1][2][3], or 10 squared 4 times. It is equal to 10 quadrillion in the short scale and 10 billiard in the long scale.

Its full decimal expansion is 10,000,000,000,000,000.

It is also called Jing (京 in Chinese) or Kei (けい in Japanese) in both Japanese counting system and Chinese counting system.[4]

Aarex Tiaokhiao calls this number sxdoocol or 16-noogol.[5]

CompactStar gave the name tetryriad for this number as part of the -yriad system, referring to it being myriad4.[6]

10 Quadrillion Dollars

A Byllion dollars in 25 piles of 100 dollar bills, in comparison to the Empire State Building

As a banknote denomination[]

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

Approximations[]

Notation Lower bound Upper bound
Scientific notation \(1\times10^{16}\)
Arrow notation \(10\uparrow16\)
Steinhaus-Moser Notation 13[3] 14[3]
Copy notation 9[16] 1[17]
Taro's multivariable Ackermann function A(3,50) A(3,51)
Pound-Star Notation #*(2,4,4)*5 #*(5)*21
BEAF {10,16}
Hyper-E notation E16
Bashicu matrix system (0)(0)[10000]
Hyperfactorial array notation 18! 19!
Fast-growing hierarchy \(f_2(47)\) \(f_2(48)\)
Hardy hierarchy \(H_{\omega^2}(47)\) \(H_{\omega^2}(48)\)
Slow-growing hierarchy \(g_{\omega^{\omega+6}}(10), g_{\omega^{2}}^{4}(10)\)

Sources[]

See also[]


-yriad system
Main article: -yriad
myriad · dyriad · tryriad · tetryriad · pentyriad · hexyriad · heptyriad · octyriad · ennyriad · decyriad
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