56558664887 has 4 divisors (see below), whose sum is σ = 56586405360. Its totient is φ = 56530924416.

The previous prime is 56558664793. The next prime is 56558664889. The reversal of 56558664887 is 78846685565.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78846685565 = 5 ⋅15769337113.

It is a cyclic number.

It is not a de Polignac number, because 56558664887 - 2¹² = 56558660791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56558664889) 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, 13867178 + ... + 13871255.

It is an arithmetic number, because the mean of its divisors is an integer number (14146601340).

Almost surely, 2^56558664887 is an apocalyptic number.

56558664887 is a deficient number, since it is larger than the sum of its proper divisors (27740473).

56558664887 is a wasteful number, since it uses less digits than its factorization.

56558664887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27740472.

The product of its digits is 387072000, while the sum is 68.

The spelling of 56558664887 in words is "fifty-six billion, five hundred fifty-eight million, six hundred sixty-four thousand, eight hundred eighty-seven".