72973562920 has 16 divisors (see below), whose sum is σ = 164190516660. Its totient is φ = 29189425152.

The previous prime is 72973562917. The next prime is 72973562933. The reversal of 72973562920 is 2926537927.

It can be written as a sum of positive squares in 2 ways, for example, as 71707199524 + 1266363396 = 267782^2 + 35586^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 912169497 + ... + 912169576.

Almost surely, 2^72973562920 is an apocalyptic number.

It is an amenable number.

72973562920 is an abundant number, since it is smaller than the sum of its proper divisors (91216953740).

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

72973562920 is a wasteful number, since it uses less digits than its factorization.

72973562920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1824339084 (or 1824339080 counting only the distinct ones).

The product of its (nonzero) digits is 2857680, while the sum is 52.

The spelling of 72973562920 in words is "seventy-two billion, nine hundred seventy-three million, five hundred sixty-two thousand, nine hundred twenty".