56558460809 has 2 divisors, whose sum is σ = 56558460810. Its totient is φ = 56558460808.

The previous prime is 56558460733. The next prime is 56558460817. The reversal of 56558460809 is 90806485565.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37170683209 + 19387777600 = 192797^2 + 139240^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56558460809 is a prime.

It is not a weakly prime, because it can be changed into another prime (56558460839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28279230404 + 28279230405.

It is an arithmetic number, because the mean of its divisors is an integer number (28279230405).

Almost surely, 2^56558460809 is an apocalyptic number.

It is an amenable number.

56558460809 is a deficient number, since it is larger than the sum of its proper divisors (1).

56558460809 is an equidigital number, since it uses as much as digits as its factorization.

56558460809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368000, while the sum is 56.

The spelling of 56558460809 in words is "fifty-six billion, five hundred fifty-eight million, four hundred sixty thousand, eight hundred nine".