56776567 has 4 divisors (see below), whose sum is σ = 56797416. Its totient is φ = 56755720.

The previous prime is 56776561. The next prime is 56776591. The reversal of 56776567 is 76567765.

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

It is a cyclic number.

It is not a de Polignac number, because 56776567 - 2⁷ = 56776439 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56776567.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56776561) 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, 5593 + ... + 12034.

It is an arithmetic number, because the mean of its divisors is an integer number (14199354).

Almost surely, 2^56776567 is an apocalyptic number.

56776567 is a deficient number, since it is larger than the sum of its proper divisors (20849).

56776567 is a wasteful number, since it uses less digits than its factorization.

56776567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20848.

The product of its digits is 1852200, while the sum is 49.

The square root of 56776567 is about 7535.0226940601. The cubic root of 56776567 is about 384.3465995893.

The spelling of 56776567 in words is "fifty-six million, seven hundred seventy-six thousand, five hundred sixty-seven".