72816877065 has 32 divisors (see below), whose sum is σ = 117283541760. Its totient is φ = 38577668096.

The previous prime is 72816877061. The next prime is 72816877127. The reversal of 72816877065 is 56077861827.

It is a cyclic number.

It is not a de Polignac number, because 72816877065 - 2² = 72816877061 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 72816876996 and 72816877014.

It is not an unprimeable number, because it can be changed into a prime (72816877061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1366441 + ... + 1418729.

It is an arithmetic number, because the mean of its divisors is an integer number (3665110680).

Almost surely, 2^72816877065 is an apocalyptic number.

It is an amenable number.

72816877065 is a deficient number, since it is larger than the sum of its proper divisors (44466664695).

72816877065 is a wasteful number, since it uses less digits than its factorization.

72816877065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52913.

The product of its (nonzero) digits is 7902720, while the sum is 57.

The spelling of 72816877065 in words is "seventy-two billion, eight hundred sixteen million, eight hundred seventy-seven thousand, sixty-five".