72902991856 has 10 divisors (see below), whose sum is σ = 141249546752. Its totient is φ = 36451495920.

The previous prime is 72902991851. The next prime is 72902991857. The reversal of 72902991856 is 65819920927.

It is a self number, because there is not a number n which added to its sum of digits gives 72902991856.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72902991851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2278218480 + ... + 2278218511.

Almost surely, 2^72902991856 is an apocalyptic number.

It is an amenable number.

72902991856 is a deficient number, since it is larger than the sum of its proper divisors (68346554896).

72902991856 is a wasteful number, since it uses less digits than its factorization.

72902991856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4556436999 (or 4556436993 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 58.

The spelling of 72902991856 in words is "seventy-two billion, nine hundred two million, nine hundred ninety-one thousand, eight hundred fifty-six".