56137866 has 8 divisors (see below), whose sum is σ = 112275744. Its totient is φ = 18712620.

The previous prime is 56137849. The next prime is 56137867. The reversal of 56137866 is 66873165.

It is a sphenic number, since it is the product of 3 distinct primes.

56137866 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (56137867) 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 3 ways as a sum of consecutive naturals, for example, 4678150 + ... + 4678161.

It is an arithmetic number, because the mean of its divisors is an integer number (14034468).

Almost surely, 2^56137866 is an apocalyptic number.

56137866 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

56137866 is a wasteful number, since it uses less digits than its factorization.

56137866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9356316.

The product of its digits is 181440, while the sum is 42.

The square root of 56137866 is about 7492.5206706422. The cubic root of 56137866 is about 382.8999413669.

The spelling of 56137866 in words is "fifty-six million, one hundred thirty-seven thousand, eight hundred sixty-six".