Name some mathematically interesting many digited integers?

I'm looking for numbers such as the number of states the longest running 3-state 3-symbol machine found so far runs for (119,112,334,170,342,540). I'm specifically looking for numbers with varied digits, so NOT something like a googol, which just has a bunch of zeros. Significantly larger numbers than the one I stated are also interesting to me, but maybe not something like Graham's number where it's not even feasible to write down all the digits X-D Thanks!