12756627881 has 2 divisors, whose sum is σ = 12756627882. Its totient is φ = 12756627880.

The previous prime is 12756627869. The next prime is 12756627887. The reversal of 12756627881 is 18872665721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12744377881 + 12250000 = 112891^2 + 3500^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12756627881 is a prime.

It is a super-2 number, since 2×12756627881² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12756627887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6378313940 + 6378313941.

It is an arithmetic number, because the mean of its divisors is an integer number (6378313941).

Almost surely, 2^12756627881 is an apocalyptic number.

It is an amenable number.

12756627881 is a deficient number, since it is larger than the sum of its proper divisors (1).

12756627881 is an equidigital number, since it uses as much as digits as its factorization.

12756627881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2257920, while the sum is 53.

The spelling of 12756627881 in words is "twelve billion, seven hundred fifty-six million, six hundred twenty-seven thousand, eight hundred eighty-one".