18368469986544 has 240 divisors, whose sum is σ = 53336239512192. Its totient is φ = 5897455091712.

The previous prime is 18368469986513. The next prime is 18368469986563. The reversal of 18368469986544 is 44568996486381.

18368469986544 is a `hidden beast` number, since 1 + 8 + 3 + 6 + 8 + 4 + 69 + 9 + 8 + 6 + 544 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 225746572 + ... + 225827924.

Almost surely, 2^{18368469986544} 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 18368469986544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26668119756096).

18368469986544 is an abundant number, since it is smaller than the sum of its proper divisors (34967769525648).

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

18368469986544 is a wasteful number, since it uses less digits than its factorization.

18368469986544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81944 (or 81935 counting only the distinct ones).

The product of its digits is 8599633920, while the sum is 81.

The spelling of 18368469986544 in words is "eighteen trillion, three hundred sixty-eight billion, four hundred sixty-nine million, nine hundred eighty-six thousand, five hundred forty-four".