12998320225 has 24 divisors (see below), whose sum is σ = 17914960512. Its totient is φ = 9274948800.

The previous prime is 12998320189. The next prime is 12998320253. The reversal of 12998320225 is 52202389921.

It is not a de Polignac number, because 12998320225 - 2¹⁵ = 12998287457 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 431337 + ... + 460486.

It is an arithmetic number, because the mean of its divisors is an integer number (746456688).

Almost surely, 2^12998320225 is an apocalyptic number.

It is an amenable number.

12998320225 is a deficient number, since it is larger than the sum of its proper divisors (4916640287).

12998320225 is a wasteful number, since it uses less digits than its factorization.

12998320225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891897 (or 891892 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 43.

The spelling of 12998320225 in words is "twelve billion, nine hundred ninety-eight million, three hundred twenty thousand, two hundred twenty-five".