72220317081915 has 32 divisors (see below), whose sum is σ = 123898444231680. Its totient is φ = 35792883869184.

The previous prime is 72220317081793. The next prime is 72220317081943. The reversal of 72220317081915 is 51918071302227.

It is not a de Polignac number, because 72220317081915 - 2¹² = 72220317077819 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1792492069 + ... + 1792532358.

It is an arithmetic number, because the mean of its divisors is an integer number (3871826382240).

Almost surely, 2^{72220317081915} is an apocalyptic number.

72220317081915 is a deficient number, since it is larger than the sum of its proper divisors (51678127149765).

72220317081915 is a wasteful number, since it uses less digits than its factorization.

72220317081915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3585024531.

The product of its (nonzero) digits is 423360, while the sum is 48.

The spelling of 72220317081915 in words is "seventy-two trillion, two hundred twenty billion, three hundred seventeen million, eighty-one thousand, nine hundred fifteen".