198646725 has 12 divisors (see below), whose sum is σ = 328429376. Its totient is φ = 105944880.

The previous prime is 198646663. The next prime is 198646733. The reversal of 198646725 is 527646891.

It is not a de Polignac number, because 198646725 - 2⁶ = 198646661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1324237 + ... + 1324386.

Almost surely, 2^198646725 is an apocalyptic number.

198646725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

198646725 is a deficient number, since it is larger than the sum of its proper divisors (129782651).

198646725 is a wasteful number, since it uses less digits than its factorization.

198646725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2648636 (or 2648631 counting only the distinct ones).

The product of its digits is 725760, while the sum is 48.

The square root of 198646725 is about 14094.2089171404. The cubic root of 198646725 is about 583.4815614242.

The spelling of 198646725 in words is "one hundred ninety-eight million, six hundred forty-six thousand, seven hundred twenty-five".