Square number

1,000,000 16 10^72 10^78 10^90 10,000 64 10^36 7744 1521 10000000000 googol googolplex 10^52 729 1444 10^600 10^54 100,000,000 10^16 10^20 49 36 81 144 121 196 169 900 256 25 fourth power 1024 225 841 1,000,000,000,000 529 484 784