79385880025 has 27 divisors (see below), whose sum is σ = 101237368701. Its totient is φ = 61751679840.

The previous prime is 79385880011. The next prime is 79385880043. The reversal of 79385880025 is 52008858397.

The square root of 79385880025 is 281755.

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 7536149721 + 71849730304 = 86811^2 + 268048^2 .

It is a de Polignac number, because none of the positive numbers 2^k-79385880025 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 52123914 + ... + 52125436.

Almost surely, 2^79385880025 is an apocalyptic number.

79385880025 is the 281755-th square number.

79385880025 is the 140878-th centered octagonal number.

It is an amenable number.

79385880025 is a deficient number, since it is larger than the sum of its proper divisors (21851488676).

79385880025 is an frugal number, since it uses more digits than its factorization.

79385880025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3130 (or 1565 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 55.

The spelling of 79385880025 in words is "seventy-nine billion, three hundred eighty-five million, eight hundred eighty thousand, twenty-five".