56785161 has 24 divisors (see below), whose sum is σ = 79769664. Its totient is φ = 35922880.

The previous prime is 56785159. The next prime is 56785163. The reversal of 56785161 is 16158765.

It is an interprime number because it is at equal distance from previous prime (56785159) and next prime (56785163).

It is not a de Polignac number, because 56785161 - 2¹ = 56785159 is a prime.

Its product of digits (50400) is a multiple of the sum of its prime divisors (420).

It is not an unprimeable number, because it can be changed into a prime (56785163) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 178975 + ... + 179291.

It is an arithmetic number, because the mean of its divisors is an integer number (3323736).

Almost surely, 2^56785161 is an apocalyptic number.

It is an amenable number.

56785161 is a deficient number, since it is larger than the sum of its proper divisors (22984503).

56785161 is a wasteful number, since it uses less digits than its factorization.

56785161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449 (or 420 counting only the distinct ones).

The product of its digits is 50400, while the sum is 39.

The square root of 56785161 is about 7535.5929428281. The cubic root of 56785161 is about 384.3659908524.

The spelling of 56785161 in words is "fifty-six million, seven hundred eighty-five thousand, one hundred sixty-one".