198489792197 has 16 divisors (see below), whose sum is σ = 210151487040. Its totient is φ = 187151029632.

The previous prime is 198489792187. The next prime is 198489792199. The reversal of 198489792197 is 791297984891.

It is a cyclic number.

It is not a de Polignac number, because 198489792197 - 2⁴ = 198489792181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198489792199) 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 15 ways as a sum of consecutive naturals, for example, 7739798 + ... + 7765400.

It is an arithmetic number, because the mean of its divisors is an integer number (13134467940).

Almost surely, 2^198489792197 is an apocalyptic number.

It is an amenable number.

198489792197 is a deficient number, since it is larger than the sum of its proper divisors (11661694843).

198489792197 is a wasteful number, since it uses less digits than its factorization.

198489792197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31892.

The product of its digits is 164602368, while the sum is 74.

The spelling of 198489792197 in words is "one hundred ninety-eight billion, four hundred eighty-nine million, seven hundred ninety-two thousand, one hundred ninety-seven".