56605551589 has 2 divisors, whose sum is σ = 56605551590. Its totient is φ = 56605551588.

The previous prime is 56605551577. The next prime is 56605551631. The reversal of 56605551589 is 98515550665.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42666207364 + 13939344225 = 206558^2 + 118065^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56605551589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56605552589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28302775794 + 28302775795.

It is an arithmetic number, because the mean of its divisors is an integer number (28302775795).

Almost surely, 2^56605551589 is an apocalyptic number.

It is an amenable number.

56605551589 is a deficient number, since it is larger than the sum of its proper divisors (1).

56605551589 is an equidigital number, since it uses as much as digits as its factorization.

56605551589 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8100000, while the sum is 55.

The spelling of 56605551589 in words is "fifty-six billion, six hundred five million, five hundred fifty-one thousand, five hundred eighty-nine".