The square root of 72578728069225 is 8519315.
It is an unprimeable number.
Almost surely, 272578728069225 is an apocalyptic number.
72578728069225 is the 8519315-th square number.
72578728069225 is the 4259658-th centered octagonal number.
It is an amenable number.
72578728069225 is an equidigital number, since it uses as much as digits as its factorization.
72578728069225 is an evil number, because the sum of its binary digits is even.
The spelling of 72578728069225 in words is "seventy-two trillion, five hundred seventy-eight billion, seven hundred twenty-eight million, sixty-nine thousand, two hundred twenty-five".