56681786 has 16 divisors (see below), whose sum is σ = 98262720. Its totient is φ = 24018720.

The previous prime is 56681777. The next prime is 56681809. The reversal of 56681786 is 68718665.

56681786 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 56681786.

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 in 7 ways as a sum of consecutive naturals, for example, 21500 + ... + 23991.

It is an arithmetic number, because the mean of its divisors is an integer number (6141420).

Almost surely, 2^56681786 is an apocalyptic number.

56681786 is a deficient number, since it is larger than the sum of its proper divisors (41580934).

56681786 is a wasteful number, since it uses less digits than its factorization.

56681786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45589.

The product of its digits is 483840, while the sum is 47.

The square root of 56681786 is about 7528.7307031132. The cubic root of 56681786 is about 384.1326084612.

The spelling of 56681786 in words is "fifty-six million, six hundred eighty-one thousand, seven hundred eighty-six".