72154884664 has 32 divisors (see below), whose sum is σ = 138296128320. Its totient is φ = 35277330816.

The previous prime is 72154884653. The next prime is 72154884667. The reversal of 72154884664 is 46648845127.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72154884667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 323182 + ... + 498754.

It is an arithmetic number, because the mean of its divisors is an integer number (4321754010).

Almost surely, 2^72154884664 is an apocalyptic number.

It is an amenable number.

72154884664 is a deficient number, since it is larger than the sum of its proper divisors (66141243656).

72154884664 is a wasteful number, since it uses less digits than its factorization.

72154884664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176719 (or 176715 counting only the distinct ones).

The product of its digits is 10321920, while the sum is 55.

The spelling of 72154884664 in words is "seventy-two billion, one hundred fifty-four million, eight hundred eighty-four thousand, six hundred sixty-four".