56656515 has 8 divisors (see below), whose sum is σ = 90650448. Its totient is φ = 30216800.

The previous prime is 56656507. The next prime is 56656577. The reversal of 56656515 is 51565665.

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

It is not a de Polignac number, because 56656515 - 2³ = 56656507 is a prime.

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, 1888536 + ... + 1888565.

It is an arithmetic number, because the mean of its divisors is an integer number (11331306).

Almost surely, 2^56656515 is an apocalyptic number.

56656515 is a deficient number, since it is larger than the sum of its proper divisors (33993933).

56656515 is a wasteful number, since it uses less digits than its factorization.

56656515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3777109.

The product of its digits is 135000, while the sum is 39.

The square root of 56656515 is about 7527.0522118556. The cubic root of 56656515 is about 384.0755127646.

It can be divided in two parts, 566565 and 15, that added together give a triangular number (566580 = T₁₀₆₄).

The spelling of 56656515 in words is "fifty-six million, six hundred fifty-six thousand, five hundred fifteen".