79871872157 has 48 divisors (see below), whose sum is σ = 108708437376. Its totient is φ = 57214080000.

The previous prime is 79871872049. The next prime is 79871872183. The reversal of 79871872157 is 75127817897.

It is not a de Polignac number, because 79871872157 - 2¹⁴ = 79871855773 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79871872157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79871872187) 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 47 ways as a sum of consecutive naturals, for example, 554657 + ... + 683657.

It is an arithmetic number, because the mean of its divisors is an integer number (2264759112).

Almost surely, 2^79871872157 is an apocalyptic number.

79871872157 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

It is an amenable number.

79871872157 is a deficient number, since it is larger than the sum of its proper divisors (28836565219).

79871872157 is a wasteful number, since it uses less digits than its factorization.

79871872157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129090 (or 129079 counting only the distinct ones).

The product of its digits is 13829760, while the sum is 62.

The spelling of 79871872157 in words is "seventy-nine billion, eight hundred seventy-one million, eight hundred seventy-two thousand, one hundred fifty-seven".