18112599864 has 112 divisors (see below), whose sum is σ = 51564242400. Its totient is φ = 5960957184.

The previous prime is 18112599859. The next prime is 18112599893. The reversal of 18112599864 is 46899521181.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 18112599864.

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 27 ways as a sum of consecutive naturals, for example, 441072 + ... + 480384.

Almost surely, 2^18112599864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18112599864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25782121200).

18112599864 is an abundant number, since it is smaller than the sum of its proper divisors (33451642536).

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

18112599864 is an equidigital number, since it uses as much as digits as its factorization.

18112599864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39416 (or 39397 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 54.

The spelling of 18112599864 in words is "eighteen billion, one hundred twelve million, five hundred ninety-nine thousand, eight hundred sixty-four".