12520658725 has 6 divisors (see below), whose sum is σ = 15525616850. Its totient is φ = 10016526960.

The previous prime is 12520658723. The next prime is 12520658767. The reversal of 12520658725 is 52785602521.

It can be written as a sum of positive squares in 3 ways, for example, as 151437636 + 12369221089 = 12306^2 + 111217^2 .

It is not a de Polignac number, because 12520658725 - 2¹ = 12520658723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12520658723) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 250413150 + ... + 250413199.

Almost surely, 2^12520658725 is an apocalyptic number.

It is an amenable number.

12520658725 is a deficient number, since it is larger than the sum of its proper divisors (3004958125).

12520658725 is an equidigital number, since it uses as much as digits as its factorization.

12520658725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500826359 (or 500826354 counting only the distinct ones).

The product of its (nonzero) digits is 336000, while the sum is 43.

The spelling of 12520658725 in words is "twelve billion, five hundred twenty million, six hundred fifty-eight thousand, seven hundred twenty-five".