56641887 has 12 divisors (see below), whose sum is σ = 81970200. Its totient is φ = 37690128.

The previous prime is 56641853. The next prime is 56641919. The reversal of 56641887 is 78814665.

It is a happy number.

56641887 is a `hidden beast` number, since 566 + 4 + 1 + 8 + 87 = 666.

56641887 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 56641887 - 2¹⁹ = 56117599 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56641187) 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 11 ways as a sum of consecutive naturals, for example, 637 + ... + 10662.

It is an arithmetic number, because the mean of its divisors is an integer number (6830850).

Almost surely, 2^56641887 is an apocalyptic number.

56641887 is a deficient number, since it is larger than the sum of its proper divisors (25328313).

56641887 is a wasteful number, since it uses less digits than its factorization.

56641887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11862 (or 11859 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 56641887 is about 7526.0804539946. The cubic root of 56641887 is about 384.0424554296.

The spelling of 56641887 in words is "fifty-six million, six hundred forty-one thousand, eight hundred eighty-seven".