12188447568 has 480 divisors, whose sum is σ = 42022488960. Its totient is φ = 3342643200.

The previous prime is 12188447549. The next prime is 12188447581. The reversal of 12188447568 is 86574488121.

12188447568 is a `hidden beast` number, since 12 + 188 + 447 + 5 + 6 + 8 = 666.

It is a super-2 number, since 2×12188447568² (a number of 21 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 77633346 + ... + 77633502.

It is an arithmetic number, because the mean of its divisors is an integer number (87546852).

Almost surely, 2^12188447568 is an apocalyptic number.

12188447568 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 12188447568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21011244480).

12188447568 is an abundant number, since it is smaller than the sum of its proper divisors (29834041392).

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

12188447568 is a wasteful number, since it uses less digits than its factorization.

12188447568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264 (or 221 counting only the distinct ones).

The product of its digits is 3440640, while the sum is 54.

The spelling of 12188447568 in words is "twelve billion, one hundred eighty-eight million, four hundred forty-seven thousand, five hundred sixty-eight".