56671911 has 12 divisors (see below), whose sum is σ = 81993288. Its totient is φ = 37719504.

The previous prime is 56671877. The next prime is 56671913. The reversal of 56671911 is 11917665.

It is a happy number.

56671911 is a `hidden beast` number, since 566 + 7 + 1 + 91 + 1 = 666.

It is not a de Polignac number, because 56671911 - 2¹⁸ = 56409767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56671913) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1056 + ... + 10698.

It is an arithmetic number, because the mean of its divisors is an integer number (6832774).

Almost surely, 2^56671911 is an apocalyptic number.

56671911 is a deficient number, since it is larger than the sum of its proper divisors (25321377).

56671911 is a wasteful number, since it uses less digits than its factorization.

56671911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10302 (or 10299 counting only the distinct ones).

The product of its digits is 11340, while the sum is 36.

The square root of 56671911 is about 7528.0748535067. The cubic root of 56671911 is about 384.1102995322.

The spelling of 56671911 in words is "fifty-six million, six hundred seventy-one thousand, nine hundred eleven".