72333979728 has 80 divisors (see below), whose sum is σ = 202680527616. Its totient is φ = 22139514880.

The previous prime is 72333979721. The next prime is 72333979759. The reversal of 72333979728 is 82797933327.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72333979721) 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, 1047576 + ... + 1114487.

Almost surely, 2^72333979728 is an apocalyptic number.

It is an amenable number.

72333979728 is an abundant number, since it is smaller than the sum of its proper divisors (130346547888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72333979728 is a wasteful number, since it uses less digits than its factorization.

72333979728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2162132 (or 2162126 counting only the distinct ones).

The product of its digits is 24004512, while the sum is 60.

The spelling of 72333979728 in words is "seventy-two billion, three hundred thirty-three million, nine hundred seventy-nine thousand, seven hundred twenty-eight".