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The number of Planck volumes (cubic Planck lengths) in the observable universe is around $$4.65 \times 10^{185}$$.[1]

One Planck length is $$1.616 \times 10^{-35}$$ meters, and the volume of the observable universe is $$\approx 4 \times 10^{80}$$ cubic meters.

Approximations

Notation Approximation
Scientific notation $$4.65\times 10^{185}$$
BEAF {10,185}
Fast-growing hierarchy $$f_2(607)$$

Sources

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