Without checking the numbers in detail, according to Wikipedia, the volume of the observable universe is about $3.5cdot 10^{80} mbox{ m}^3$, and the volume of Earth is about
$1.08321cdot 10^{21} mbox{ m}^3$.
By dividing the two volumes we get a factor of $3.2cdot 10^{59}$, or written as decimal number: The observable comoving volume of the universe is about
320,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000-times the volume of Earth.
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