12568427881 has 9 divisors (see below), whose sum is σ = 12756019773. Its totient is φ = 12383560140.

The previous prime is 12568427869. The next prime is 12568427891. The reversal of 12568427881 is 18872486521.

The square root of 12568427881 is 112109.

It is a perfect power (a square), and thus also a powerful number.

It is a de Polignac number, because none of the positive numbers 2^k-12568427881 is a prime.

It is a super-2 number, since 2×12568427881² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12568427801) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7958950 + ... + 7960528.

Almost surely, 2^12568427881 is an apocalyptic number.

12568427881 is the 112109-th square number.

12568427881 is the 56055-th centered octagonal number.

It is an amenable number.

12568427881 is a deficient number, since it is larger than the sum of its proper divisors (187591892).

12568427881 is an frugal number, since it uses more digits than its factorization.

12568427881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3300 (or 1650 counting only the distinct ones).

The product of its digits is 1720320, while the sum is 52.

The spelling of 12568427881 in words is "twelve billion, five hundred sixty-eight million, four hundred twenty-seven thousand, eight hundred eighty-one".