72400585508 has 24 divisors (see below), whose sum is σ = 133394896320. Its totient is φ = 34288483680.

The previous prime is 72400585469. The next prime is 72400585511. The reversal of 72400585508 is 80558500427.

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, 323393 + ... + 499383.

It is an arithmetic number, because the mean of its divisors is an integer number (5558120680).

Almost surely, 2^72400585508 is an apocalyptic number.

It is an amenable number.

72400585508 is a deficient number, since it is larger than the sum of its proper divisors (60994310812).

72400585508 is a wasteful number, since it uses less digits than its factorization.

72400585508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181427 (or 181425 counting only the distinct ones).

The product of its (nonzero) digits is 448000, while the sum is 44.

The spelling of 72400585508 in words is "seventy-two billion, four hundred million, five hundred eighty-five thousand, five hundred eight".