56657550 has 24 divisors (see below), whose sum is σ = 140511096. Its totient is φ = 15108640.

The previous prime is 56657537. The next prime is 56657551. The reversal of 56657550 is 5575665.

It is a junction number, because it is equal to n+sod(n) for n = 56657499 and 56657508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56657551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 188709 + ... + 189008.

It is an arithmetic number, because the mean of its divisors is an integer number (5854629).

Almost surely, 2^56657550 is an apocalyptic number.

56657550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

56657550 is an abundant number, since it is smaller than the sum of its proper divisors (83853546).

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

56657550 is a wasteful number, since it uses less digits than its factorization.

56657550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377732 (or 377727 counting only the distinct ones).

The product of its (nonzero) digits is 157500, while the sum is 39.

The square root of 56657550 is about 7527.1209635557. The cubic root of 56657550 is about 384.0778515115.

The spelling of 56657550 in words is "fifty-six million, six hundred fifty-seven thousand, five hundred fifty".