12165562225 has 6 divisors (see below), whose sum is σ = 15085297190. Its totient is φ = 9732449760.

The previous prime is 12165562217. The next prime is 12165562291. The reversal of 12165562225 is 52226556121.

It can be written as a sum of positive squares in 3 ways, for example, as 977000049 + 11188562176 = 31257^2 + 105776^2 .

It is not a de Polignac number, because 12165562225 - 2³ = 12165562217 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, 243311220 + ... + 243311269.

Almost surely, 2^12165562225 is an apocalyptic number.

It is an amenable number.

12165562225 is a deficient number, since it is larger than the sum of its proper divisors (2919734965).

12165562225 is an equidigital number, since it uses as much as digits as its factorization.

12165562225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486622499 (or 486622494 counting only the distinct ones).

The product of its digits is 72000, while the sum is 37.

The spelling of 12165562225 in words is "twelve billion, one hundred sixty-five million, five hundred sixty-two thousand, two hundred twenty-five".