72787165 has 16 divisors (see below), whose sum is σ = 96235776. Its totient is φ = 52408000.

The previous prime is 72787153. The next prime is 72787181. The reversal of 72787165 is 56178727.

It is not a de Polignac number, because 72787165 - 2⁵ = 72787133 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 997 + ... + 12106.

It is an arithmetic number, because the mean of its divisors is an integer number (6014736).

Almost surely, 2^72787165 is an apocalyptic number.

It is an amenable number.

72787165 is a deficient number, since it is larger than the sum of its proper divisors (23448611).

72787165 is a wasteful number, since it uses less digits than its factorization.

72787165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13220.

The product of its digits is 164640, while the sum is 43.

The square root of 72787165 is about 8531.5394273249. The cubic root of 72787165 is about 417.5273554691.

The spelling of 72787165 in words is "seventy-two million, seven hundred eighty-seven thousand, one hundred sixty-five".