72685779396 has 48 divisors (see below), whose sum is σ = 170672409600. Its totient is φ = 24075511200.

The previous prime is 72685779379. The next prime is 72685779431. The reversal of 72685779396 is 69397758627.

It is a self number, because there is not a number n which added to its sum of digits gives 72685779396.

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, 11722305 + ... + 11728503.

It is an arithmetic number, because the mean of its divisors is an integer number (3555675200).

Almost surely, 2^72685779396 is an apocalyptic number.

It is an amenable number.

72685779396 is an abundant number, since it is smaller than the sum of its proper divisors (97986630204).

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

72685779396 is a wasteful number, since it uses less digits than its factorization.

72685779396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12224 (or 12222 counting only the distinct ones).

The product of its digits is 240045120, while the sum is 69.

The spelling of 72685779396 in words is "seventy-two billion, six hundred eighty-five million, seven hundred seventy-nine thousand, three hundred ninety-six".