55657856 has 16 divisors (see below), whose sum is σ = 110881140. Its totient is φ = 27828864.

The previous prime is 55657837. The next prime is 55657937. The reversal of 55657856 is 65875655.

It is a tau number, because it is divible by the number of its divisors (16).

It is a self number, because there is not a number n which added to its sum of digits gives 55657856.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217286 + ... + 217541.

Almost surely, 2^55657856 is an apocalyptic number.

It is an amenable number.

55657856 is a deficient number, since it is larger than the sum of its proper divisors (55223284).

55657856 is an equidigital number, since it uses as much as digits as its factorization.

55657856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434841 (or 434829 counting only the distinct ones).

The product of its digits is 1260000, while the sum is 47.

The square root of 55657856 is about 7460.4192911659. The cubic root of 55657856 is about 381.8054801244.

The spelling of 55657856 in words is "fifty-five million, six hundred fifty-seven thousand, eight hundred fifty-six".