56745911 has 4 divisors (see below), whose sum is σ = 56887824. Its totient is φ = 56604000.

The previous prime is 56745889. The next prime is 56745919. The reversal of 56745911 is 11954765.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56745911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56745919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70355 + ... + 71156.

It is an arithmetic number, because the mean of its divisors is an integer number (14221956).

Almost surely, 2^56745911 is an apocalyptic number.

56745911 is a deficient number, since it is larger than the sum of its proper divisors (141913).

56745911 is a wasteful number, since it uses less digits than its factorization.

56745911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141912.

The product of its digits is 37800, while the sum is 38.

The square root of 56745911 is about 7532.9881853087. The cubic root of 56745911 is about 384.2774122982.

The spelling of 56745911 in words is "fifty-six million, seven hundred forty-five thousand, nine hundred eleven".