79936221831 has 16 divisors (see below), whose sum is σ = 110027688960. Its totient is φ = 51568032960.

The previous prime is 79936221793. The next prime is 79936221863. The reversal of 79936221831 is 13812263997.

It is not a de Polignac number, because 79936221831 - 2⁶ = 79936221767 is a prime.

It is a super-2 number, since 2×79936221831² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79936222831) 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, 1920600 + ... + 1961778.

It is an arithmetic number, because the mean of its divisors is an integer number (6876730560).

Almost surely, 2^79936221831 is an apocalyptic number.

79936221831 is a deficient number, since it is larger than the sum of its proper divisors (30091467129).

79936221831 is a wasteful number, since it uses less digits than its factorization.

79936221831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62086.

The product of its digits is 979776, while the sum is 51.

The spelling of 79936221831 in words is "seventy-nine billion, nine hundred thirty-six million, two hundred twenty-one thousand, eight hundred thirty-one".