568639659989 has 2 divisors, whose sum is σ = 568639659990. Its totient is φ = 568639659988.

The previous prime is 568639659949. The next prime is 568639659997. The reversal of 568639659989 is 989956936865.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 436997679364 + 131641980625 = 661058^2 + 362825^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-568639659989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (568639659949) 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, 284319829994 + 284319829995.

It is an arithmetic number, because the mean of its divisors is an integer number (284319829995).

Almost surely, 2^568639659989 is an apocalyptic number.

It is an amenable number.

568639659989 is a deficient number, since it is larger than the sum of its proper divisors (1).

568639659989 is an equidigital number, since it uses as much as digits as its factorization.

568639659989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6802444800, while the sum is 83.

The spelling of 568639659989 in words is "five hundred sixty-eight billion, six hundred thirty-nine million, six hundred fifty-nine thousand, nine hundred eighty-nine".