198797028194 has 16 divisors (see below), whose sum is σ = 301851047232. Its totient is φ = 98180510928.

The previous prime is 198797028187. The next prime is 198797028251. The reversal of 198797028194 is 491820797891.

It is a self number, because there is not a number n which added to its sum of digits gives 198797028194.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 691772 + ... + 936024.

It is an arithmetic number, because the mean of its divisors is an integer number (18865690452).

Almost surely, 2^198797028194 is an apocalyptic number.

198797028194 is a deficient number, since it is larger than the sum of its proper divisors (103054019038).

198797028194 is a wasteful number, since it uses less digits than its factorization.

198797028194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249241.

The product of its (nonzero) digits is 18289152, while the sum is 65.

The spelling of 198797028194 in words is "one hundred ninety-eight billion, seven hundred ninety-seven million, twenty-eight thousand, one hundred ninety-four".