56115578 has 4 divisors (see below), whose sum is σ = 84173370. Its totient is φ = 28057788.

The previous prime is 56115557. The next prime is 56115581. The reversal of 56115578 is 87551165.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 47430769 + 8684809 = 6887^2 + 2947^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14028893 + ... + 14028896.

Almost surely, 2^56115578 is an apocalyptic number.

56115578 is a deficient number, since it is larger than the sum of its proper divisors (28057792).

56115578 is a wasteful number, since it uses less digits than its factorization.

56115578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28057791.

The product of its digits is 42000, while the sum is 38.

The square root of 56115578 is about 7491.0331730677. The cubic root of 56115578 is about 382.8492613527.

The spelling of 56115578 in words is "fifty-six million, one hundred fifteen thousand, five hundred seventy-eight".