79157199431 has 4 divisors (see below), whose sum is σ = 79158042000. Its totient is φ = 79156356864.

The previous prime is 79157199413. The next prime is 79157199437. The reversal of 79157199431 is 13499175197.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 79157199431 - 2⁶ = 79157199367 is a prime.

It is a super-2 number, since 2×79157199431² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79157199437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 259706 + ... + 475143.

It is an arithmetic number, because the mean of its divisors is an integer number (19789510500).

Almost surely, 2^79157199431 is an apocalyptic number.

79157199431 is a deficient number, since it is larger than the sum of its proper divisors (842569).

79157199431 is a wasteful number, since it uses less digits than its factorization.

79157199431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842568.

The product of its digits is 2143260, while the sum is 56.

The spelling of 79157199431 in words is "seventy-nine billion, one hundred fifty-seven million, one hundred ninety-nine thousand, four hundred thirty-one".