3972064656 has 60 divisors (see below), whose sum is σ = 11936466672. Its totient is φ = 1134874944.

The previous prime is 3972064633. The next prime is 3972064667. The reversal of 3972064656 is 6564602793.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 842050 + ... + 846753.

Almost surely, 2^3972064656 is an apocalyptic number.

It is an amenable number.

3972064656 is an abundant number, since it is smaller than the sum of its proper divisors (7964402016).

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

3972064656 is a wasteful number, since it uses less digits than its factorization.

3972064656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1688828 (or 1688815 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 48.

The square root of 3972064656 is about 63024.3179733030. The cubic root of 3972064656 is about 1583.6970329141.

The spelling of 3972064656 in words is "three billion, nine hundred seventy-two million, sixty-four thousand, six hundred fifty-six".