79115625625 has 15 divisors (see below), whose sum is σ = 98871673593. Its totient is φ = 63286875000.

The previous prime is 79115625623. The next prime is 79115625637. The reversal of 79115625625 is 52652651197.

The square root of 79115625625 is 281275.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6202665049 + 72912960576 = 78757^2 + 270024^2 .

It is not a de Polignac number, because 79115625625 - 2¹ = 79115625623 is a prime.

It is a super-4 number, since 4×79115625625⁴ (a number of 45 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79115625623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 7026250 + ... + 7037500.

Almost surely, 2^79115625625 is an apocalyptic number.

79115625625 is the 281275-th square number.

79115625625 is the 140638-th centered octagonal number.

It is an amenable number.

79115625625 is a deficient number, since it is larger than the sum of its proper divisors (19756047968).

79115625625 is an frugal number, since it uses more digits than its factorization.

79115625625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22522 (or 11256 counting only the distinct ones).

The product of its digits is 1134000, while the sum is 49.

Multiplying 79115625625 by its sum of digits (49), we get a square (3876665655625 = 1968925²).

The spelling of 79115625625 in words is "seventy-nine billion, one hundred fifteen million, six hundred twenty-five thousand, six hundred twenty-five".