198209199100 has 36 divisors (see below), whose sum is σ = 469215233928. Its totient is φ = 72076072000.

The previous prime is 198209199073. The next prime is 198209199107. The reversal of 198209199100 is 1991902891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198209199107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 90093991 + ... + 90096190.

It is an arithmetic number, because the mean of its divisors is an integer number (13033756498).

Almost surely, 2^198209199100 is an apocalyptic number.

198209199100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198209199100 is an abundant number, since it is smaller than the sum of its proper divisors (271006034828).

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

198209199100 is a wasteful number, since it uses less digits than its factorization.

198209199100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180190206 (or 180190199 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 49.

The spelling of 198209199100 in words is "one hundred ninety-eight billion, two hundred nine million, one hundred ninety-nine thousand, one hundred".