18358518559 has 2 divisors, whose sum is σ = 18358518560. Its totient is φ = 18358518558.

The previous prime is 18358518517. The next prime is 18358518571. The reversal of 18358518559 is 95581585381.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18358518559 - 2⁹ = 18358518047 is a prime.

It is a super-2 number, since 2×18358518559² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18358518359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9179259279 + 9179259280.

It is an arithmetic number, because the mean of its divisors is an integer number (9179259280).

Almost surely, 2^18358518559 is an apocalyptic number.

18358518559 is a deficient number, since it is larger than the sum of its proper divisors (1).

18358518559 is an equidigital number, since it uses as much as digits as its factorization.

18358518559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640000, while the sum is 58.

The spelling of 18358518559 in words is "eighteen billion, three hundred fifty-eight million, five hundred eighteen thousand, five hundred fifty-nine".