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The dust mite-crowd is equal to 5E9 using Hyper-E notation.[1] The name was coined by Sbiis Saibian. It is equal to 5,000,000,000.

## As a banknote denomination

Some currencies, such as the German Papiermark, the 1993 Yugoslav dinar, and the second and third Zimbabwean dollars, had banknotes with this number in the denomination.

## Approximations

Notation Lower bound Upper bound
Scientific notation $$5\times10^9$$
Arrow notation $$87\uparrow5$$ $$12\uparrow9$$
Steinhaus-Moser Notation 9[3] 10[3]
Copy notation 4[10] 5[10]
Taro's multivariable Ackermann function A(3,29) A(3,30)
Pound-Star Notation #*(3,0,5)*3 #*(1,2,1)*4
BEAF {87,5} {12,9}
Bashicu matrix system (0)[70710] (0)[70711]
Hyperfactorial array notation 12! 13!
Fast-growing hierarchy $$f_2(27)$$ $$f_2(28)$$
Hardy hierarchy $$H_{\omega^2}(27)$$ $$H_{\omega^2}(28)$$
Slow-growing hierarchy $$g_{\omega^9\times5}(10)$$

## Sources

-minutia group
n-ary numbers with multipliers
Eyelash mite group: eyelash mite-speck · eyelash mite-crumb · eyelash mite-chunk · (binary/ternary/octal)eyelash mite · eyelash mite-bunch · eyelash mite-crowd · eyelash mite-swarm
Dust mite group: dust mite-speck · dust mite-crumb · dust mite-chunk · (binary/ternary/octal)dust mite · dust mite-bunch · dust mite-crowd · dust mite-swarm
Cheese mite group: cheese mite-speck · cheese mite-crumb · cheese mite-chunk · (binary/ternary/octal)cheese mite · cheese mite-bunch · cheese mite-crowd · cheese mite-swarm
Clover mite group: clover mite-speck · clover mite-crumb · clover mite-chunk · (binary/ternary/octal)clover mite · clover mite-bunch · clover mite-crowd · clover mite-swarm
Pipsqueak group: (binary/ternary/octal)pipsqueak
Little squeaker group: (binary/ternary/octal)little squeaker
Small fry group: (binary/ternary/octal)small fry
Guppy group: (binary/ternary/octal)guppyspeck · (binary/ternary/octal)guppycrumb · (binary/ternary/octal)guppychunk · (ternary/quaternary/quinary/duodecimal/hexadecimal/vigesimal/sexagesimal)guppy(bit/byte)
Minnow group: (binary/ternary/octal)minnowspeck · (binary/ternary/octal)minnowcrumb · (binary/ternary/octal)minnowchunk · (ternary)minnow(bit/byte)
Goby group: (binary/ternary/octal)gobyspeck · (binary/ternary/octal)gobycrumb · (binary/ternary/octal)gobychunk · (ternary)goby(bit/byte)