12531612325 has 12 divisors (see below), whose sum is σ = 15959178820. Its totient is φ = 9754335360.

The previous prime is 12531612319. The next prime is 12531612341. The reversal of 12531612325 is 52321613521.

It can be written as a sum of positive squares in 6 ways, for example, as 389115076 + 12142497249 = 19726^2 + 110193^2 .

It is not a de Polignac number, because 12531612325 - 2²³ = 12523223717 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6772920 + ... + 6774769.

Almost surely, 2^12531612325 is an apocalyptic number.

It is an amenable number.

12531612325 is a deficient number, since it is larger than the sum of its proper divisors (3427566495).

12531612325 is a wasteful number, since it uses less digits than its factorization.

12531612325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13547736 (or 13547731 counting only the distinct ones).

The product of its digits is 10800, while the sum is 31.

It can be divided in two parts, 125316 and 12325, that added together give a square (137641 = 371²).

The spelling of 12531612325 in words is "twelve billion, five hundred thirty-one million, six hundred twelve thousand, three hundred twenty-five".