18558059599 has 2 divisors, whose sum is σ = 18558059600. Its totient is φ = 18558059598.

The previous prime is 18558059501. The next prime is 18558059627. The reversal of 18558059599 is 99595085581.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18558059599 - 2¹⁵ = 18558026831 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18558059599.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18558051599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9279029799 + 9279029800.

It is an arithmetic number, because the mean of its divisors is an integer number (9279029800).

Almost surely, 2^18558059599 is an apocalyptic number.

18558059599 is a deficient number, since it is larger than the sum of its proper divisors (1).

18558059599 is an equidigital number, since it uses as much as digits as its factorization.

18558059599 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160000, while the sum is 64.

The spelling of 18558059599 in words is "eighteen billion, five hundred fifty-eight million, fifty-nine thousand, five hundred ninety-nine".