198891345022 has 4 divisors (see below), whose sum is σ = 298337017536. Its totient is φ = 99445672510.

The previous prime is 198891345007. The next prime is 198891345043. The reversal of 198891345022 is 220543198891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 220543198891 = 1039 ⋅212264869.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49722836254 + ... + 49722836257.

It is an arithmetic number, because the mean of its divisors is an integer number (74584254384).

Almost surely, 2^198891345022 is an apocalyptic number.

198891345022 is a deficient number, since it is larger than the sum of its proper divisors (99445672514).

198891345022 is an equidigital number, since it uses as much as digits as its factorization.

198891345022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99445672513.

The product of its (nonzero) digits is 1244160, while the sum is 52.

The spelling of 198891345022 in words is "one hundred ninety-eight billion, eight hundred ninety-one million, three hundred forty-five thousand, twenty-two".