72742553856 has 108 divisors (see below), whose sum is σ = 239696871232. Its totient is φ = 20783582208.

The previous prime is 72742553809. The next prime is 72742553867. The reversal of 72742553856 is 65835524727.

72742553856 is a `hidden beast` number, since 7 + 2 + 7 + 4 + 2 + 553 + 85 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2239036 + ... + 2271291.

Almost surely, 2^72742553856 is an apocalyptic number.

It is an amenable number.

72742553856 is an abundant number, since it is smaller than the sum of its proper divisors (166954317376).

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

72742553856 is a wasteful number, since it uses less digits than its factorization.

72742553856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4510356 (or 4510339 counting only the distinct ones).

The product of its digits is 14112000, while the sum is 54.

The spelling of 72742553856 in words is "seventy-two billion, seven hundred forty-two million, five hundred fifty-three thousand, eight hundred fifty-six".