56401911 has 36 divisors (see below), whose sum is σ = 87539088. Its totient is φ = 34924032.

The previous prime is 56401883. The next prime is 56401913. The reversal of 56401911 is 11910465.

56401911 is a `hidden beast` number, since 5 + 640 + 1 + 9 + 11 = 666.

It is not a de Polignac number, because 56401911 - 2⁶ = 56401847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56401913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 581415 + ... + 581511.

Almost surely, 2^56401911 is an apocalyptic number.

56401911 is a deficient number, since it is larger than the sum of its proper divisors (31137177).

56401911 is a wasteful number, since it uses less digits than its factorization.

56401911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232 (or 176 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 56401911 is about 7510.1205716020. The cubic root of 56401911 is about 383.4993271436.

The spelling of 56401911 in words is "fifty-six million, four hundred one thousand, nine hundred eleven".