18159784885 has 16 divisors (see below), whose sum is σ = 23789342592. Its totient is φ = 13197931200.

The previous prime is 18159784871. The next prime is 18159784913. The reversal of 18159784885 is 58848795181.

It is not a de Polignac number, because 18159784885 - 2²⁵ = 18126230453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 34506 + ... + 193675.

It is an arithmetic number, because the mean of its divisors is an integer number (1486833912).

Almost surely, 2^18159784885 is an apocalyptic number.

It is an amenable number.

18159784885 is a deficient number, since it is larger than the sum of its proper divisors (5629557707).

18159784885 is a wasteful number, since it uses less digits than its factorization.

18159784885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229644.

The product of its digits is 25804800, while the sum is 64.

The spelling of 18159784885 in words is "eighteen billion, one hundred fifty-nine million, seven hundred eighty-four thousand, eight hundred eighty-five".