56611587 has 4 divisors (see below), whose sum is σ = 75482120. Its totient is φ = 37741056.

The previous prime is 56611543. The next prime is 56611589. The reversal of 56611587 is 78511665.

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

It is not a de Polignac number, because 56611587 - 2⁷ = 56611459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56611589) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9435262 + ... + 9435267.

It is an arithmetic number, because the mean of its divisors is an integer number (18870530).

Almost surely, 2^56611587 is an apocalyptic number.

56611587 is a deficient number, since it is larger than the sum of its proper divisors (18870533).

56611587 is a wasteful number, since it uses less digits than its factorization.

56611587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18870532.

The product of its digits is 50400, while the sum is 39.

The square root of 56611587 is about 7524.0671847080. The cubic root of 56611587 is about 383.9739633497.

The spelling of 56611587 in words is "fifty-six million, six hundred eleven thousand, five hundred eighty-seven".