57123656 has 8 divisors (see below), whose sum is σ = 107106870. Its totient is φ = 28561824.

The previous prime is 57123643. The next prime is 57123667. The reversal of 57123656 is 65632175.

57123656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 33756100 + 23367556 = 5810^2 + 4834^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×57123656² = 6526224149612672, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3570221 + ... + 3570236.

Almost surely, 2^57123656 is an apocalyptic number.

It is an amenable number.

57123656 is a deficient number, since it is larger than the sum of its proper divisors (49983214).

57123656 is a wasteful number, since it uses less digits than its factorization.

57123656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7140463 (or 7140459 counting only the distinct ones).

The product of its digits is 37800, while the sum is 35.

The square root of 57123656 is about 7558.0193172550. The cubic root of 57123656 is about 385.1282105180.

The spelling of 57123656 in words is "fifty-seven million, one hundred twenty-three thousand, six hundred fifty-six".