72711820918 has 16 divisors (see below), whose sum is σ = 119109456720. Its totient is φ = 33015695200.

The previous prime is 72711820889. The next prime is 72711820931. The reversal of 72711820918 is 81902811727.

It is a super-2 number, since 2×72711820918² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1735453 + ... + 1776856.

It is an arithmetic number, because the mean of its divisors is an integer number (7444341045).

Almost surely, 2^72711820918 is an apocalyptic number.

72711820918 is a deficient number, since it is larger than the sum of its proper divisors (46397635802).

72711820918 is a wasteful number, since it uses less digits than its factorization.

72711820918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3513263.

The product of its (nonzero) digits is 112896, while the sum is 46.

The spelling of 72711820918 in words is "seventy-two billion, seven hundred eleven million, eight hundred twenty thousand, nine hundred eighteen".