72977649720 has 64 divisors (see below), whose sum is σ = 226482372000. Its totient is φ = 18789646848.

The previous prime is 72977649677. The next prime is 72977649733. The reversal of 72977649720 is 2794677927.

It is a Harshad number since it is a multiple of its sum of digits (60).

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, 10481815 + ... + 10488774.

Almost surely, 2^72977649720 is an apocalyptic number.

It is an amenable number.

72977649720 is an abundant number, since it is smaller than the sum of its proper divisors (153504722280).

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

72977649720 is a wasteful number, since it uses less digits than its factorization.

72977649720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20970632 (or 20970628 counting only the distinct ones).

The product of its (nonzero) digits is 18670176, while the sum is 60.

The spelling of 72977649720 in words is "seventy-two billion, nine hundred seventy-seven million, six hundred forty-nine thousand, seven hundred twenty".