72064864871856 has 50 divisors (see below), whose sum is σ = 208576626650612. Its totient is φ = 24021621623520.

The previous prime is 72064864871837. The next prime is 72064864871947. The reversal of 72064864871856 is 65817846846027.

72064864871856 is a `hidden beast` number, since 7 + 2 + 0 + 6 + 4 + 86 + 487 + 18 + 56 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 27802801510 + ... + 27802804101.

Almost surely, 2^{72064864871856} is an apocalyptic number.

It is an amenable number.

72064864871856 is an abundant number, since it is smaller than the sum of its proper divisors (136511761778756).

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

72064864871856 is a wasteful number, since it uses less digits than its factorization.

72064864871856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55605605631 (or 55605605616 counting only the distinct ones).

The product of its (nonzero) digits is 867041280, while the sum is 72.

The spelling of 72064864871856 in words is "seventy-two trillion, sixty-four billion, eight hundred sixty-four million, eight hundred seventy-one thousand, eight hundred fifty-six".