56778785 has 16 divisors (see below), whose sum is σ = 78007296. Its totient is φ = 38864448.

The previous prime is 56778737. The next prime is 56778797. The reversal of 56778785 is 58787765.

It is not a de Polignac number, because 56778785 - 2⁶ = 56778721 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25424 + ... + 27566.

It is an arithmetic number, because the mean of its divisors is an integer number (4875456).

Almost surely, 2^56778785 is an apocalyptic number.

It is an amenable number.

56778785 is a deficient number, since it is larger than the sum of its proper divisors (21228511).

56778785 is a wasteful number, since it uses less digits than its factorization.

56778785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2912.

The product of its digits is 3292800, while the sum is 53.

The square root of 56778785 is about 7535.1698720069. The cubic root of 56778785 is about 384.3516044103.

The spelling of 56778785 in words is "fifty-six million, seven hundred seventy-eight thousand, seven hundred eighty-five".