12631256325 has 18 divisors (see below), whose sum is σ = 22623983954. Its totient is φ = 6736669920.

The previous prime is 12631256299. The next prime is 12631256329. The reversal of 12631256325 is 52365213621.

12631256325 is a `hidden beast` number, since 1 + 2 + 6 + 3 + 12 + 5 + 632 + 5 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 33663204 + 12597593121 = 5802^2 + 112239^2 .

It is not a de Polignac number, because 12631256325 - 2¹⁷ = 12631125253 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12631256325.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12631256329) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 28069234 + ... + 28069683.

Almost surely, 2^12631256325 is an apocalyptic number.

12631256325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12631256325 is a deficient number, since it is larger than the sum of its proper divisors (9992727629).

12631256325 is a wasteful number, since it uses less digits than its factorization.

12631256325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56138933 (or 56138925 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

Adding to 12631256325 its reverse (52365213621), we get a palindrome (64996469946).

The spelling of 12631256325 in words is "twelve billion, six hundred thirty-one million, two hundred fifty-six thousand, three hundred twenty-five".