72816876985 has 16 divisors (see below), whose sum is σ = 94488788736. Its totient is φ = 53660293888.

The previous prime is 72816876983. The next prime is 72816876991. The reversal of 72816876985 is 58967861827.

It is a cyclic number.

It is not a de Polignac number, because 72816876985 - 2¹ = 72816876983 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72816876985.

It is not an unprimeable number, because it can be changed into a prime (72816876983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9109507 + ... + 9117496.

It is an arithmetic number, because the mean of its divisors is an integer number (5905549296).

Almost surely, 2^72816876985 is an apocalyptic number.

It is an amenable number.

72816876985 is a deficient number, since it is larger than the sum of its proper divisors (21671911751).

72816876985 is a wasteful number, since it uses less digits than its factorization.

72816876985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18227072.

The product of its digits is 81285120, while the sum is 67.

The spelling of 72816876985 in words is "seventy-two billion, eight hundred sixteen million, eight hundred seventy-six thousand, nine hundred eighty-five".