Just to be clear: (9^62773 + 2)^83721
The "+ 2" is essentially meaningless, by comparison to the thing it is added to. Even when raised to a moderately larger power (83,721), its contribution to the result is tiny.
So, the essential part is the (9^62773)^83721, where you just multiply the exponents. Hence 9^5,339,139,333.
To express that as a tens exponent, just multiply the exponent by log10(9), and get a little more than 10^5,094,833,715.
Now, a googol is 10^100, so it's clearly quite a bit larger than a googol.
However, a googolplex is 10^googol. That's 10^10,000,000,000,000, ... ,000,000,000 (where the exponent, fully written out, would have 333 groups of three zeroes. Hence it is hugely less than a googolplex.
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