18549386159 has 2 divisors, whose sum is σ = 18549386160. Its totient is φ = 18549386158.

The previous prime is 18549386129. The next prime is 18549386201. The reversal of 18549386159 is 95168394581.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18549386159 - 2⁸ = 18549385903 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18549386098 and 18549386107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18549386129) 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, 9274693079 + 9274693080.

It is an arithmetic number, because the mean of its divisors is an integer number (9274693080).

Almost surely, 2^18549386159 is an apocalyptic number.

18549386159 is a deficient number, since it is larger than the sum of its proper divisors (1).

18549386159 is an equidigital number, since it uses as much as digits as its factorization.

18549386159 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9331200, while the sum is 59.

The spelling of 18549386159 in words is "eighteen billion, five hundred forty-nine million, three hundred eighty-six thousand, one hundred fifty-nine".