There is also the number googol, which is a 1 with 100 zeros behind it (10), and the number googolplex, which is a 1 with a "googol" of zeros behind it, (10). And also the number googolplexian, 1 with a googolplex number of zeros behind it. Googolplexianplex, or googleplexianplexian are still theoretical numbers, but they might have some use in real life.