198581093172 has 144 divisors (see below), whose sum is σ = 627485913600. Its totient is φ = 51443138880.

The previous prime is 198581093167. The next prime is 198581093251. The reversal of 198581093172 is 271390185891.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 956079 + ... + 1145097.

Almost surely, 2^198581093172 is an apocalyptic number.

198581093172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198581093172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (313742956800).

198581093172 is an abundant number, since it is smaller than the sum of its proper divisors (428904820428).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

198581093172 is a wasteful number, since it uses less digits than its factorization.

198581093172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189426 (or 189421 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 54.

The spelling of 198581093172 in words is "one hundred ninety-eight billion, five hundred eighty-one million, ninety-three thousand, one hundred seventy-two".