79815025 has 12 divisors (see below), whose sum is σ = 99730224. Its totient is φ = 63362000.

The previous prime is 79815013. The next prime is 79815053. The reversal of 79815025 is 52051897.

It is not a de Polignac number, because 79815025 - 2⁵ = 79814993 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8911 + ... + 15460.

It is an arithmetic number, because the mean of its divisors is an integer number (8310852).

Almost surely, 2^79815025 is an apocalyptic number.

It is an amenable number.

79815025 is a deficient number, since it is larger than the sum of its proper divisors (19915199).

79815025 is a wasteful number, since it uses less digits than its factorization.

79815025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24512 (or 24507 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 37.

The square root of 79815025 is about 8933.9255089798. The cubic root of 79815025 is about 430.5545845895.

The spelling of 79815025 in words is "seventy-nine million, eight hundred fifteen thousand, twenty-five".