72220317081916 has 6 divisors (see below), whose sum is σ = 126385554893360. Its totient is φ = 36110158540956.

The previous prime is 72220317081793. The next prime is 72220317081943. The reversal of 72220317081916 is 61918071302227.

It is a self number, because there is not a number n which added to its sum of digits gives 72220317081916.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9027539635236 + ... + 9027539635243.

Almost surely, 2^{72220317081916} is an apocalyptic number.

It is an amenable number.

72220317081916 is a deficient number, since it is larger than the sum of its proper divisors (54165237811444).

72220317081916 is a wasteful number, since it uses less digits than its factorization.

72220317081916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18055079270483 (or 18055079270481 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 49.

The spelling of 72220317081916 in words is "seventy-two trillion, two hundred twenty billion, three hundred seventeen million, eighty-one thousand, nine hundred sixteen".