56778957 has 6 divisors (see below), whose sum is σ = 82014062. Its totient is φ = 37852632.

The previous prime is 56778923. The next prime is 56778977. The reversal of 56778957 is 75987765.

56778957 is a `hidden beast` number, since 567 + 78 + 9 + 5 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 33246756 + 23532201 = 5766^2 + 4851^2 .

It is not a de Polignac number, because 56778957 - 2¹⁰ = 56777933 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 (56778977) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3154378 + ... + 3154395.

Almost surely, 2^56778957 is an apocalyptic number.

It is an amenable number.

56778957 is a deficient number, since it is larger than the sum of its proper divisors (25235105).

56778957 is a wasteful number, since it uses less digits than its factorization.

56778957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6308779 (or 6308776 counting only the distinct ones).

The product of its digits is 3704400, while the sum is 54.

The square root of 56778957 is about 7535.1812851450. The cubic root of 56778957 is about 384.3519925154.

It can be divided in two parts, 567 and 78957, that added together give a square (79524 = 282²).

The spelling of 56778957 in words is "fifty-six million, seven hundred seventy-eight thousand, nine hundred fifty-seven".