198053183891 has 2 divisors, whose sum is σ = 198053183892. Its totient is φ = 198053183890.

The previous prime is 198053183843. The next prime is 198053183929. The reversal of 198053183891 is 198381350891.

198053183891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 198053183891 - 2¹⁰ = 198053182867 is a prime.

It is not a weakly prime, because it can be changed into another prime (198053188891) 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, 99026591945 + 99026591946.

It is an arithmetic number, because the mean of its divisors is an integer number (99026591946).

Almost surely, 2^198053183891 is an apocalyptic number.

198053183891 is a deficient number, since it is larger than the sum of its proper divisors (1).

198053183891 is an equidigital number, since it uses as much as digits as its factorization.

198053183891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1866240, while the sum is 56.

The spelling of 198053183891 in words is "one hundred ninety-eight billion, fifty-three million, one hundred eighty-three thousand, eight hundred ninety-one".