72257374320 has 80 divisors (see below), whose sum is σ = 227670002592. Its totient is φ = 18952750080.

The previous prime is 72257374223. The next prime is 72257374349. The reversal of 72257374320 is 2347375227.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×72257374320² (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 15 ways as a sum of consecutive naturals, for example, 2453167 + ... + 2482446.

Almost surely, 2^72257374320 is an apocalyptic number.

It is an amenable number.

72257374320 is an abundant number, since it is smaller than the sum of its proper divisors (155412628272).

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

72257374320 is a wasteful number, since it uses less digits than its factorization.

72257374320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4935690 (or 4935684 counting only the distinct ones).

The product of its (nonzero) digits is 493920, while the sum is 42.

The spelling of 72257374320 in words is "seventy-two billion, two hundred fifty-seven million, three hundred seventy-four thousand, three hundred twenty".