18556965359 has 2 divisors, whose sum is σ = 18556965360. Its totient is φ = 18556965358.

The previous prime is 18556965347. The next prime is 18556965379. The reversal of 18556965359 is 95356965581.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18556965359 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18556965379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9278482679 + 9278482680.

It is an arithmetic number, because the mean of its divisors is an integer number (9278482680).

Almost surely, 2^18556965359 is an apocalyptic number.

18556965359 is a deficient number, since it is larger than the sum of its proper divisors (1).

18556965359 is an equidigital number, since it uses as much as digits as its factorization.

18556965359 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43740000, while the sum is 62.

The spelling of 18556965359 in words is "eighteen billion, five hundred fifty-six million, nine hundred sixty-five thousand, three hundred fifty-nine".