76997925225 has 81 divisors (see below), whose sum is σ = 149441507397. Its totient is φ = 37880032320.

The previous prime is 76997925211. The next prime is 76997925233. The reversal of 76997925225 is 52252979967.

The square root of 76997925225 is 277485.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 19846329129 + 57151596096 = 140877^2 + 239064^2 .

It is not a de Polignac number, because 76997925225 - 2⁷ = 76997925097 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 54108864 + ... + 54110286.

Almost surely, 2^76997925225 is an apocalyptic number.

76997925225 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

76997925225 is the 277485-th square number.

76997925225 is the 138743-rd centered octagonal number.

It is an amenable number.

76997925225 is a deficient number, since it is larger than the sum of its proper divisors (72443582172).

76997925225 is a wasteful number, since it uses less digits than its factorization.

76997925225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2888 (or 1444 counting only the distinct ones).

The product of its digits is 42865200, while the sum is 63.

The spelling of 76997925225 in words is "seventy-six billion, nine hundred ninety-seven million, nine hundred twenty-five thousand, two hundred twenty-five".