72157768366944 has 96 divisors (see below), whose sum is σ = 204023926600704. Its totient is φ = 22198094645760.

The previous prime is 72157768366919. The next prime is 72157768367077. The reversal of 72157768366944 is 44966386775127.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 862737 + ... + 12044079.

It is an arithmetic number, because the mean of its divisors is an integer number (2125249235424).

Almost surely, 2^{72157768366944} is an apocalyptic number.

It is an amenable number.

72157768366944 is an abundant number, since it is smaller than the sum of its proper divisors (131866158233760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72157768366944 is a wasteful number, since it uses less digits than its factorization.

72157768366944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11186540 (or 11186532 counting only the distinct ones).

The product of its digits is 2560481280, while the sum is 75.

The spelling of 72157768366944 in words is "seventy-two trillion, one hundred fifty-seven billion, seven hundred sixty-eight million, three hundred sixty-six thousand, nine hundred forty-four".