198791619398 has 8 divisors (see below), whose sum is σ = 298189762320. Its totient is φ = 99395031960.

The previous prime is 198791619361. The next prime is 198791619413. The reversal of 198791619398 is 893916197891.

198791619398 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14183 + ... + 630701.

It is an arithmetic number, because the mean of its divisors is an integer number (37273720290).

Almost surely, 2^198791619398 is an apocalyptic number.

198791619398 is a deficient number, since it is larger than the sum of its proper divisors (99398142922).

198791619398 is a wasteful number, since it uses less digits than its factorization.

198791619398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777742.

The product of its digits is 52907904, while the sum is 71.

The spelling of 198791619398 in words is "one hundred ninety-eight billion, seven hundred ninety-one million, six hundred nineteen thousand, three hundred ninety-eight".