12556497168 has 240 divisors, whose sum is σ = 37684046400. Its totient is φ = 3891732480.

The previous prime is 12556497139. The next prime is 12556497199. The reversal of 12556497168 is 86179465521.

It is a happy number.

12556497168 is a `hidden beast` number, since 1 + 2 + 5 + 564 + 9 + 71 + 6 + 8 = 666.

It is a super-2 number, since 2×12556497168² (a number of 21 digits) contains 22 as substring.

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, 52101528 + ... + 52101768.

It is an arithmetic number, because the mean of its divisors is an integer number (157016860).

Almost surely, 2^12556497168 is an apocalyptic number.

12556497168 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 12556497168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18842023200).

12556497168 is an abundant number, since it is smaller than the sum of its proper divisors (25127549232).

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

12556497168 is a wasteful number, since it uses less digits than its factorization.

12556497168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550 (or 541 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 54.

The spelling of 12556497168 in words is "twelve billion, five hundred fifty-six million, four hundred ninety-seven thousand, one hundred sixty-eight".