79971161125 has 32 divisors (see below), whose sum is σ = 105536471040. Its totient is φ = 60402960000.

The previous prime is 79971161119. The next prime is 79971161143. The reversal of 79971161125 is 52116117997.

It is a happy number.

It is not a de Polignac number, because 79971161125 - 2³ = 79971161117 is a prime.

It is a super-2 number, since 2×79971161125² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 92805 + ... + 410554.

It is an arithmetic number, because the mean of its divisors is an integer number (3298014720).

Almost surely, 2^79971161125 is an apocalyptic number.

It is an amenable number.

79971161125 is a deficient number, since it is larger than the sum of its proper divisors (25565309915).

79971161125 is a wasteful number, since it uses less digits than its factorization.

79971161125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503446 (or 503436 counting only the distinct ones).

The product of its digits is 238140, while the sum is 49.

The spelling of 79971161125 in words is "seventy-nine billion, nine hundred seventy-one million, one hundred sixty-one thousand, one hundred twenty-five".