199844847225 has 72 divisors (see below), whose sum is σ = 370755770112. Its totient is φ = 102792643200.

The previous prime is 199844847221. The next prime is 199844847239. The reversal of 199844847225 is 522748448991.

199844847225 is a `hidden beast` number, since 1 + 9 + 9 + 84 + 484 + 72 + 2 + 5 = 666.

It is not a de Polignac number, because 199844847225 - 2² = 199844847221 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (199844847221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1994782 + ... + 2092568.

It is an arithmetic number, because the mean of its divisors is an integer number (5149385696).

Almost surely, 2^199844847225 is an apocalyptic number.

199844847225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

199844847225 is a deficient number, since it is larger than the sum of its proper divisors (170910922887).

199844847225 is a wasteful number, since it uses less digits than its factorization.

199844847225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98127 (or 98119 counting only the distinct ones).

The product of its digits is 46448640, while the sum is 63.

The spelling of 199844847225 in words is "one hundred ninety-nine billion, eight hundred forty-four million, eight hundred forty-seven thousand, two hundred twenty-five".