56978755 has 4 divisors (see below), whose sum is σ = 68374512. Its totient is φ = 45583000.

The previous prime is 56978749. The next prime is 56978767. The reversal of 56978755 is 55787965.

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

It is a de Polignac number, because none of the positive numbers 2^k-56978755 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5697871 + ... + 5697880.

It is an arithmetic number, because the mean of its divisors is an integer number (17093628).

Almost surely, 2^56978755 is an apocalyptic number.

56978755 is a deficient number, since it is larger than the sum of its proper divisors (11395757).

56978755 is a wasteful number, since it uses less digits than its factorization.

56978755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11395756.

The product of its digits is 2646000, while the sum is 52.

The square root of 56978755 is about 7548.4273196475. The cubic root of 56978755 is about 384.8022934981.

The spelling of 56978755 in words is "fifty-six million, nine hundred seventy-eight thousand, seven hundred fifty-five".