57656121 has 16 divisors (see below), whose sum is σ = 78086400. Its totient is φ = 37836288.

The previous prime is 57656119. The next prime is 57656149. The reversal of 57656121 is 12165675.

It is not a de Polignac number, because 57656121 - 2¹ = 57656119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57656171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69135 + ... + 69963.

It is an arithmetic number, because the mean of its divisors is an integer number (4880400).

Almost surely, 2^57656121 is an apocalyptic number.

It is an amenable number.

57656121 is a deficient number, since it is larger than the sum of its proper divisors (20430279).

57656121 is a wasteful number, since it uses less digits than its factorization.

57656121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1168.

The product of its digits is 12600, while the sum is 33.

The square root of 57656121 is about 7593.1627797644. The cubic root of 57656121 is about 386.3211395868.

The spelling of 57656121 in words is "fifty-seven million, six hundred fifty-six thousand, one hundred twenty-one".