72564871522 has 96 divisors (see below), whose sum is σ = 135297703296. Its totient is φ = 29118872640.

The previous prime is 72564871447. The next prime is 72564871529. The reversal of 72564871522 is 22517846527.

It is not an unprimeable number, because it can be changed into a prime (72564871529) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10343688 + ... + 10350700.

It is an arithmetic number, because the mean of its divisors is an integer number (1409351076).

Almost surely, 2^72564871522 is an apocalyptic number.

72564871522 is a deficient number, since it is larger than the sum of its proper divisors (62732831774).

72564871522 is a wasteful number, since it uses less digits than its factorization.

72564871522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7097 (or 7062 counting only the distinct ones).

The product of its digits is 1881600, while the sum is 49.

The spelling of 72564871522 in words is "seventy-two billion, five hundred sixty-four million, eight hundred seventy-one thousand, five hundred twenty-two".