56787582661 has 4 divisors (see below), whose sum is σ = 56845353312. Its totient is φ = 56729812012.

The previous prime is 56787582653. The next prime is 56787582701. The reversal of 56787582661 is 16628578765.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 56787582661 - 2³ = 56787582653 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56787582661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56787582601) 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, 28883851 + ... + 28885816.

It is an arithmetic number, because the mean of its divisors is an integer number (14211338328).

Almost surely, 2^56787582661 is an apocalyptic number.

It is an amenable number.

56787582661 is a deficient number, since it is larger than the sum of its proper divisors (57770651).

56787582661 is an equidigital number, since it uses as much as digits as its factorization.

56787582661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57770650.

The product of its digits is 33868800, while the sum is 61.

The spelling of 56787582661 in words is "fifty-six billion, seven hundred eighty-seven million, five hundred eighty-two thousand, six hundred sixty-one".