12181715568 has 240 divisors, whose sum is σ = 39924739296. Its totient is φ = 3426140160.

The previous prime is 12181715527. The next prime is 12181715587. The reversal of 12181715568 is 86551718121.

12181715568 is a `hidden beast` number, since 1 + 2 + 1 + 81 + 7 + 1 + 5 + 568 = 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, 1962646 + ... + 1968842.

Almost surely, 2^12181715568 is an apocalyptic number.

12181715568 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 12181715568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19962369648).

12181715568 is an abundant number, since it is smaller than the sum of its proper divisors (27743023728).

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

12181715568 is a wasteful number, since it uses less digits than its factorization.

12181715568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6312 (or 6303 counting only the distinct ones).

The product of its digits is 134400, while the sum is 45.

The spelling of 12181715568 in words is "twelve billion, one hundred eighty-one million, seven hundred fifteen thousand, five hundred sixty-eight".