56556565867 has 2 divisors, whose sum is σ = 56556565868. Its totient is φ = 56556565866.

The previous prime is 56556565847. The next prime is 56556565927. The reversal of 56556565867 is 76856565565.

56556565867 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56556565867 - 2⁷ = 56556565739 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56556565799 and 56556565808.

It is not a weakly prime, because it can be changed into another prime (56556565847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28278282933 + 28278282934.

It is an arithmetic number, because the mean of its divisors is an integer number (28278282934).

Almost surely, 2^56556565867 is an apocalyptic number.

56556565867 is a deficient number, since it is larger than the sum of its proper divisors (1).

56556565867 is an equidigital number, since it uses as much as digits as its factorization.

56556565867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 226800000, while the sum is 64.

The spelling of 56556565867 in words is "fifty-six billion, five hundred fifty-six million, five hundred sixty-five thousand, eight hundred sixty-seven".