198393899911 has 2 divisors, whose sum is σ = 198393899912. Its totient is φ = 198393899910.

The previous prime is 198393899897. The next prime is 198393899993. The reversal of 198393899911 is 119998393891.

198393899911 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198393899911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198393899111) by changing a digit.

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 as a sum of consecutive naturals, namely, 99196949955 + 99196949956.

It is an arithmetic number, because the mean of its divisors is an integer number (99196949956).

Almost surely, 2^198393899911 is an apocalyptic number.

198393899911 is a deficient number, since it is larger than the sum of its proper divisors (1).

198393899911 is an equidigital number, since it uses as much as digits as its factorization.

198393899911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34012224, while the sum is 70.

It can be divided in two parts, 198393 and 899911, that added together give a square (1098304 = 1048²).

The spelling of 198393899911 in words is "one hundred ninety-eight billion, three hundred ninety-three million, eight hundred ninety-nine thousand, nine hundred eleven".