12537681725 has 12 divisors (see below), whose sum is σ = 15660209364. Its totient is φ = 9956929920.

The previous prime is 12537681697. The next prime is 12537681743. The reversal of 12537681725 is 52718673521.

It can be written as a sum of positive squares in 6 ways, for example, as 1391812249 + 11145869476 = 37307^2 + 105574^2 .

It is not a de Polignac number, because 12537681725 - 2¹⁴ = 12537665341 is a prime.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

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 12537681725.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1826894 + ... + 1833743.

It is an arithmetic number, because the mean of its divisors is an integer number (1305017447).

Almost surely, 2^12537681725 is an apocalyptic number.

It is an amenable number.

12537681725 is a deficient number, since it is larger than the sum of its proper divisors (3122527639).

12537681725 is a wasteful number, since it uses less digits than its factorization.

12537681725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3660784 (or 3660779 counting only the distinct ones).

The product of its digits is 705600, while the sum is 47.

The spelling of 12537681725 in words is "twelve billion, five hundred thirty-seven million, six hundred eighty-one thousand, seven hundred twenty-five".