56778565 has 8 divisors (see below), whose sum is σ = 68387328. Its totient is φ = 45254160.

The previous prime is 56778551. The next prime is 56778583. The reversal of 56778565 is 56587765.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 56778565 - 2⁷ = 56778437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19597 + ... + 22306.

It is an arithmetic number, because the mean of its divisors is an integer number (8548416).

Almost surely, 2^56778565 is an apocalyptic number.

It is an amenable number.

56778565 is a deficient number, since it is larger than the sum of its proper divisors (11608763).

56778565 is a wasteful number, since it uses less digits than its factorization.

56778565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42179.

The product of its digits is 1764000, while the sum is 49.

The square root of 56778565 is about 7535.1552737817. The cubic root of 56778565 is about 384.3511079956.

The spelling of 56778565 in words is "fifty-six million, seven hundred seventy-eight thousand, five hundred sixty-five".