12444544225 has 6 divisors (see below), whose sum is σ = 15431234870. Its totient is φ = 9955635360.

The previous prime is 12444544163. The next prime is 12444544237. The reversal of 12444544225 is 52244544421.

It can be written as a sum of positive squares in 3 ways, for example, as 581195664 + 11863348561 = 24108^2 + 108919^2 .

It is not a de Polignac number, because 12444544225 - 2¹¹ = 12444542177 is a prime.

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, 248890860 + ... + 248890909.

Almost surely, 2^12444544225 is an apocalyptic number.

It is an amenable number.

12444544225 is a deficient number, since it is larger than the sum of its proper divisors (2986690645).

12444544225 is an equidigital number, since it uses as much as digits as its factorization.

12444544225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497781779 (or 497781774 counting only the distinct ones).

The product of its digits is 204800, while the sum is 37.

The spelling of 12444544225 in words is "twelve billion, four hundred forty-four million, five hundred forty-four thousand, two hundred twenty-five".