11985604225 has 24 divisors (see below), whose sum is σ = 17879282240. Its totient is φ = 7786134720.

The previous prime is 11985604223. The next prime is 11985604229. The reversal of 11985604225 is 52240658911.

It is not a de Polignac number, because 11985604225 - 2¹ = 11985604223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11985604223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1799022 + ... + 1805671.

Almost surely, 2^11985604225 is an apocalyptic number.

It is an amenable number.

11985604225 is a deficient number, since it is larger than the sum of its proper divisors (5893678015).

11985604225 is a wasteful number, since it uses less digits than its factorization.

11985604225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3604729 (or 3604724 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 43.

The spelling of 11985604225 in words is "eleven billion, nine hundred eighty-five million, six hundred four thousand, two hundred twenty-five".