57256832656 has 45 divisors (see below), whose sum is σ = 111924842211. Its totient is φ = 28375253856.

The previous prime is 57256832639. The next prime is 57256832683. The reversal of 57256832656 is 65623865275.

It is a happy number.

The square root of 57256832656 is 239284.

It is a perfect power (a square), and thus also a powerful number.

57256832656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 57256832597 and 57256832606.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 156012985 + ... + 156013351.

Almost surely, 2^57256832656 is an apocalyptic number.

57256832656 is the 239284-th square number.

It is an amenable number.

57256832656 is a deficient number, since it is larger than the sum of its proper divisors (54668009555).

57256832656 is an frugal number, since it uses more digits than its factorization.

57256832656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1068 (or 532 counting only the distinct ones).

The product of its digits is 18144000, while the sum is 55.

The spelling of 57256832656 in words is "fifty-seven billion, two hundred fifty-six million, eight hundred thirty-two thousand, six hundred fifty-six".