72774778264 has 16 divisors (see below), whose sum is σ = 136563037200. Its totient is φ = 36357968352.

The previous prime is 72774778247. The next prime is 72774778273. The reversal of 72774778264 is 46287747727.

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, 3667084 + ... + 3686875.

It is an arithmetic number, because the mean of its divisors is an integer number (8535189825).

Almost surely, 2^72774778264 is an apocalyptic number.

It is an amenable number.

72774778264 is a deficient number, since it is larger than the sum of its proper divisors (63788258936).

72774778264 is a wasteful number, since it uses less digits than its factorization.

72774778264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7355202 (or 7355198 counting only the distinct ones).

The product of its digits is 51631104, while the sum is 61.

The spelling of 72774778264 in words is "seventy-two billion, seven hundred seventy-four million, seven hundred seventy-eight thousand, two hundred sixty-four".