79521087165 has 16 divisors (see below), whose sum is σ = 137020950528. Its totient is φ = 39148842816.

The previous prime is 79521087161. The next prime is 79521087167. The reversal of 79521087165 is 56178012597.

It is not a de Polignac number, because 79521087165 - 2² = 79521087161 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79521087161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 203900029 + ... + 203900418.

It is an arithmetic number, because the mean of its divisors is an integer number (8563809408).

Almost surely, 2^79521087165 is an apocalyptic number.

It is an amenable number.

79521087165 is a deficient number, since it is larger than the sum of its proper divisors (57499863363).

79521087165 is a wasteful number, since it uses less digits than its factorization.

79521087165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407800468.

The product of its (nonzero) digits is 1058400, while the sum is 51.

The spelling of 79521087165 in words is "seventy-nine billion, five hundred twenty-one million, eighty-seven thousand, one hundred sixty-five".