12631253881 has 2 divisors, whose sum is σ = 12631253882. Its totient is φ = 12631253880.

The previous prime is 12631253839. The next prime is 12631253911. The reversal of 12631253881 is 18835213621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12037600656 + 593653225 = 109716^2 + 24365^2 .

It is a cyclic number.

It is not a de Polignac number, because 12631253881 - 2²³ = 12622865273 is a prime.

It is a super-2 number, since 2×12631253881² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12631253081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6315626940 + 6315626941.

It is an arithmetic number, because the mean of its divisors is an integer number (6315626941).

Almost surely, 2^12631253881 is an apocalyptic number.

It is an amenable number.

12631253881 is a deficient number, since it is larger than the sum of its proper divisors (1).

12631253881 is an equidigital number, since it uses as much as digits as its factorization.

12631253881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 40.

The spelling of 12631253881 in words is "twelve billion, six hundred thirty-one million, two hundred fifty-three thousand, eight hundred eighty-one".