9908865187225 has 9 divisors (see below), whose sum is σ = 12287012348767. Its totient is φ = 7927079558440.

The previous prime is 9908865187171. The next prime is 9908865187267. The reversal of 9908865187225 is 5227815688099.

The square root of 9908865187225 is 3147835.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 3567191467401 + 6341673719824 = 1888701^2 + 2518268^2 .

It is not a de Polignac number, because 9908865187225 - 2²⁵ = 9908831632793 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 15424392 + ... + 16053958.

Almost surely, 2^{9908865187225} is an apocalyptic number.

9908865187225 is the 3147835-th square number.

9908865187225 is the 1573918-th centered octagonal number.

It is an amenable number.

9908865187225 is a deficient number, since it is larger than the sum of its proper divisors (2378147161542).

9908865187225 is an frugal number, since it uses more digits than its factorization.

9908865187225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1259144 (or 629572 counting only the distinct ones).

The product of its (nonzero) digits is 174182400, while the sum is 70.

The spelling of 9908865187225 in words is "nine trillion, nine hundred eight billion, eight hundred sixty-five million, one hundred eighty-seven thousand, two hundred twenty-five".