72908163992 has 16 divisors (see below), whose sum is σ = 136705817040. Its totient is φ = 36453279456.

The previous prime is 72908163961. The next prime is 72908164001. The reversal of 72908163992 is 29936180927.

It is a congruent number.

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, 490373 + ... + 621515.

It is an arithmetic number, because the mean of its divisors is an integer number (8544113565).

Almost surely, 2^72908163992 is an apocalyptic number.

It is an amenable number.

72908163992 is a deficient number, since it is larger than the sum of its proper divisors (63797653048).

72908163992 is a wasteful number, since it uses less digits than its factorization.

72908163992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200642 (or 200638 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 56.

The spelling of 72908163992 in words is "seventy-two billion, nine hundred eight million, one hundred sixty-three thousand, nine hundred ninety-two".