72155116172156 has 24 divisors (see below), whose sum is σ = 129533459803440. Its totient is φ = 35149782995712.

The previous prime is 72155116172143. The next prime is 72155116172219. The reversal of 72155116172156 is 65127161155127.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 528277421 + ... + 528413988.

It is an arithmetic number, because the mean of its divisors is an integer number (5397227491810).

Almost surely, 2^{72155116172156} is an apocalyptic number.

It is an amenable number.

72155116172156 is a deficient number, since it is larger than the sum of its proper divisors (57378343631284).

72155116172156 is a wasteful number, since it uses less digits than its factorization.

72155116172156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1056691853 (or 1056691851 counting only the distinct ones).

The product of its digits is 882000, while the sum is 50.

The spelling of 72155116172156 in words is "seventy-two trillion, one hundred fifty-five billion, one hundred sixteen million, one hundred seventy-two thousand, one hundred fifty-six".