198051199199 has 4 divisors (see below), whose sum is σ = 226344227664. Its totient is φ = 169758170736.

The previous prime is 198051199189. The next prime is 198051199201. The reversal of 198051199199 is 991991150891.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-198051199199 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 (198051199189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14146514222 + ... + 14146514235.

It is an arithmetic number, because the mean of its divisors is an integer number (56586056916).

Almost surely, 2^198051199199 is an apocalyptic number.

198051199199 is a deficient number, since it is larger than the sum of its proper divisors (28293028465).

198051199199 is an equidigital number, since it uses as much as digits as its factorization.

198051199199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28293028464.

The product of its (nonzero) digits is 2361960, while the sum is 62.

The spelling of 198051199199 in words is "one hundred ninety-eight billion, fifty-one million, one hundred ninety-nine thousand, one hundred ninety-nine".