12438868825 has 6 divisors (see below), whose sum is σ = 15424197374. Its totient is φ = 9951095040.

The previous prime is 12438868811. The next prime is 12438868847. The reversal of 12438868825 is 52886883421.

12438868825 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 3508429824 + 8930439001 = 59232^2 + 94501^2 .

It is not a de Polignac number, because 12438868825 - 2⁹ = 12438868313 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 248777352 + ... + 248777401.

Almost surely, 2^12438868825 is an apocalyptic number.

It is an amenable number.

12438868825 is a deficient number, since it is larger than the sum of its proper divisors (2985328549).

12438868825 is an equidigital number, since it uses as much as digits as its factorization.

12438868825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497554763 (or 497554758 counting only the distinct ones).

The product of its digits is 5898240, while the sum is 55.

The spelling of 12438868825 in words is "twelve billion, four hundred thirty-eight million, eight hundred sixty-eight thousand, eight hundred twenty-five".