56779615 has 4 divisors (see below), whose sum is σ = 68135544. Its totient is φ = 45423688.

The previous prime is 56779603. The next prime is 56779627. The reversal of 56779615 is 51697765.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (56779603) and next prime (56779627).

It is a cyclic number.

It is not a de Polignac number, because 56779615 - 2⁷ = 56779487 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 3 ways as a sum of consecutive naturals, for example, 5677957 + ... + 5677966.

It is an arithmetic number, because the mean of its divisors is an integer number (17033886).

Almost surely, 2^56779615 is an apocalyptic number.

56779615 is a deficient number, since it is larger than the sum of its proper divisors (11355929).

56779615 is a wasteful number, since it uses less digits than its factorization.

56779615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11355928.

The product of its digits is 396900, while the sum is 46.

The square root of 56779615 is about 7535.2249468745. The cubic root of 56779615 is about 384.3534772358.

The spelling of 56779615 in words is "fifty-six million, seven hundred seventy-nine thousand, six hundred fifteen".