18157289178 has 96 divisors (see below), whose sum is σ = 44808292800. Its totient is φ = 4873913856.

The previous prime is 18157289173. The next prime is 18157289179. The reversal of 18157289178 is 87198275181.

It is not an unprimeable number, because it can be changed into a prime (18157289173) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 3090828 + ... + 3096696.

It is an arithmetic number, because the mean of its divisors is an integer number (466753050).

Almost surely, 2^18157289178 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18157289178, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22404146400).

18157289178 is an abundant number, since it is smaller than the sum of its proper divisors (26651003622).

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

18157289178 is a wasteful number, since it uses less digits than its factorization.

18157289178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6524 (or 6517 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 57.

The spelling of 18157289178 in words is "eighteen billion, one hundred fifty-seven million, two hundred eighty-nine thousand, one hundred seventy-eight".