18154978688 has 64 divisors (see below), whose sum is σ = 45092747520. Its totient is φ = 7073364480.

The previous prime is 18154978609. The next prime is 18154978693. The reversal of 18154978688 is 88687945181.

It is a tau number, because it is divible by the number of its divisors (64).

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 7 ways as a sum of consecutive naturals, for example, 911156 + ... + 930867.

It is an arithmetic number, because the mean of its divisors is an integer number (704574180).

Almost surely, 2^18154978688 is an apocalyptic number.

It is an amenable number.

18154978688 is an abundant number, since it is smaller than the sum of its proper divisors (26937768832).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18154978688 is a wasteful number, since it uses less digits than its factorization.

18154978688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1842055 (or 1842043 counting only the distinct ones).

The product of its digits is 30965760, while the sum is 65.

The spelling of 18154978688 in words is "eighteen billion, one hundred fifty-four million, nine hundred seventy-eight thousand, six hundred eighty-eight".