18512116697088 has 384 divisors, whose sum is σ = 62857639353600. Its totient is φ = 5273444155392.

The previous prime is 18512116697059. The next prime is 18512116697093. The reversal of 18512116697088 is 88079661121581.

18512116697088 is a `hidden beast` number, since 18 + 512 + 1 + 16 + 6 + 97 + 0 + 8 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 130372306 + ... + 130514222.

It is an arithmetic number, because the mean of its divisors is an integer number (163691769150).

Almost surely, 2^{18512116697088} is an apocalyptic number.

18512116697088 is a gapful number since it is divisible by the number (18) 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 18512116697088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31428819676800).

18512116697088 is an abundant number, since it is smaller than the sum of its proper divisors (44345522656512).

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

18512116697088 is a wasteful number, since it uses less digits than its factorization.

18512116697088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142292 (or 142266 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 63.

The spelling of 18512116697088 in words is "eighteen trillion, five hundred twelve billion, one hundred sixteen million, six hundred ninety-seven thousand, eighty-eight".