The Billillion is equal to 1,000,000,0001,000,000,0001,000,000,000 (1,000,000,000↑↑3) = 1,000,000,000109,000,000,000 = 109×109,000,000,000. This number is comparable to tetralogue. [1]

Approximations Edit

Notation Approximation
BEAF \(\{\{10,9\},3,2\}\) (exact)
Up-arrow notation \((10^{9}) \uparrow\uparrow 3\) (exact)
Chained arrow notation \((10^{9}) → 3 → 2\) (exact)
Hyperfactorial array notation \(((13!)!)!\)
Nested Factorial Notation \(13!^3\)
Fast-growing hierarchy \(f_2(f_2(f_2(27))))\)
Hardy hierarchy \(H_{(\omega^2) 3}(27)\)
Slow-growing hierarchy \(g_{\omega^{\omega^{\omega}}}(10^{9})\) (exact)

Sources Edit

  1. Number list

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