56681878 has 16 divisors (see below), whose sum is σ = 93487104. Its totient is φ = 25560360.

The previous prime is 56681861. The next prime is 56681879. The reversal of 56681878 is 87818665.

56681878 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56681879) by changing a digit.

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, 7350 + ... + 12937.

It is an arithmetic number, because the mean of its divisors is an integer number (5842944).

Almost surely, 2^56681878 is an apocalyptic number.

56681878 is a deficient number, since it is larger than the sum of its proper divisors (36805226).

56681878 is a wasteful number, since it uses less digits than its factorization.

56681878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20427.

The product of its digits is 645120, while the sum is 49.

The square root of 56681878 is about 7528.7368130384. The cubic root of 56681878 is about 384.1328162891.

The spelling of 56681878 in words is "fifty-six million, six hundred eighty-one thousand, eight hundred seventy-eight".