18163108959 has 8 divisors (see below), whose sum is σ = 24218168832. Its totient is φ = 12108394200.

The previous prime is 18163108949. The next prime is 18163108973. The reversal of 18163108959 is 95980136181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-18163108959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18163108939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85234 + ... + 208784.

It is an arithmetic number, because the mean of its divisors is an integer number (3027271104).

Almost surely, 2^18163108959 is an apocalyptic number.

18163108959 is a deficient number, since it is larger than the sum of its proper divisors (6055059873).

18163108959 is a wasteful number, since it uses less digits than its factorization.

18163108959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172557.

The product of its (nonzero) digits is 466560, while the sum is 51.

The spelling of 18163108959 in words is "eighteen billion, one hundred sixty-three million, one hundred eight thousand, nine hundred fifty-nine".