79957315525 has 6 divisors (see below), whose sum is σ = 99147071282. Its totient is φ = 63965852400.

The previous prime is 79957315457. The next prime is 79957315541. The reversal of 79957315525 is 52551375997.

It can be written as a sum of positive squares in 3 ways, for example, as 116596804 + 79840718721 = 10798^2 + 282561^2 .

It is not a de Polignac number, because 79957315525 - 2⁹ = 79957315013 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 79957315525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1599146286 + ... + 1599146335.

Almost surely, 2^79957315525 is an apocalyptic number.

It is an amenable number.

79957315525 is a deficient number, since it is larger than the sum of its proper divisors (19189755757).

79957315525 is a wasteful number, since it uses less digits than its factorization.

79957315525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3198292631 (or 3198292626 counting only the distinct ones).

The product of its digits is 14883750, while the sum is 58.

The spelling of 79957315525 in words is "seventy-nine billion, nine hundred fifty-seven million, three hundred fifteen thousand, five hundred twenty-five".