56755691 has 4 divisors (see below), whose sum is σ = 56781384. Its totient is φ = 56730000.

The previous prime is 56755661. The next prime is 56755711. The reversal of 56755691 is 19655765.

56755691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-56755691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56755631) 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 3 ways as a sum of consecutive naturals, for example, 9185 + ... + 14066.

It is an arithmetic number, because the mean of its divisors is an integer number (14195346).

Almost surely, 2^56755691 is an apocalyptic number.

56755691 is a deficient number, since it is larger than the sum of its proper divisors (25693).

56755691 is a wasteful number, since it uses less digits than its factorization.

56755691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25692.

The product of its digits is 283500, while the sum is 44.

The square root of 56755691 is about 7533.6373021270. The cubic root of 56755691 is about 384.2994874112.

The spelling of 56755691 in words is "fifty-six million, seven hundred fifty-five thousand, six hundred ninety-one".