12501535525 has 6 divisors (see below), whose sum is σ = 15501904082. Its totient is φ = 10001228400.

The previous prime is 12501535511. The next prime is 12501535559. The reversal of 12501535525 is 52553510521.

It can be written as a sum of positive squares in 3 ways, for example, as 2047291009 + 10454244516 = 45247^2 + 102246^2 .

It is not a de Polignac number, because 12501535525 - 2¹⁵ = 12501502757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 250030686 + ... + 250030735.

Almost surely, 2^12501535525 is an apocalyptic number.

It is an amenable number.

12501535525 is a deficient number, since it is larger than the sum of its proper divisors (3000368557).

12501535525 is an equidigital number, since it uses as much as digits as its factorization.

12501535525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500061431 (or 500061426 counting only the distinct ones).

The product of its (nonzero) digits is 37500, while the sum is 34.

The spelling of 12501535525 in words is "twelve billion, five hundred one million, five hundred thirty-five thousand, five hundred twenty-five".