18399541171200 has 1056 divisors, whose sum is σ = 70897693685760. Its totient is φ = 4121680281600.

The previous prime is 18399541171139. The next prime is 18399541171223. The reversal of 18399541171200 is 217114599381.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6832357054 + ... + 6832359746.

Almost surely, 2^{18399541171200} is an apocalyptic number.

18399541171200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18399541171200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35448846842880).

18399541171200 is an abundant number, since it is smaller than the sum of its proper divisors (52498152514560).

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

18399541171200 is a wasteful number, since it uses less digits than its factorization.

18399541171200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2983 (or 2960 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 51.

The spelling of 18399541171200 in words is "eighteen trillion, three hundred ninety-nine billion, five hundred forty-one million, one hundred seventy-one thousand, two hundred".