18648559189 has 16 divisors (see below), whose sum is σ = 20654548992. Its totient is φ = 16728280128.

The previous prime is 18648559157. The next prime is 18648559199. The reversal of 18648559189 is 98195584681.

It is a cyclic number.

It is not a de Polignac number, because 18648559189 - 2⁵ = 18648559157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18648559189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18648559199) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25452 + ... + 194794.

It is an arithmetic number, because the mean of its divisors is an integer number (1290909312).

Almost surely, 2^18648559189 is an apocalyptic number.

It is an amenable number.

18648559189 is a deficient number, since it is larger than the sum of its proper divisors (2005989803).

18648559189 is a wasteful number, since it uses less digits than its factorization.

18648559189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169596.

The product of its digits is 24883200, while the sum is 64.

The spelling of 18648559189 in words is "eighteen billion, six hundred forty-eight million, five hundred fifty-nine thousand, one hundred eighty-nine".