198756809159 has 2 divisors, whose sum is σ = 198756809160. Its totient is φ = 198756809158.

The previous prime is 198756809149. The next prime is 198756809171. The reversal of 198756809159 is 951908657891.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 198756809159 - 2⁸ = 198756808903 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198756809149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99378404579 + 99378404580.

It is an arithmetic number, because the mean of its divisors is an integer number (99378404580).

Almost surely, 2^198756809159 is an apocalyptic number.

198756809159 is a deficient number, since it is larger than the sum of its proper divisors (1).

198756809159 is an equidigital number, since it uses as much as digits as its factorization.

198756809159 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48988800, while the sum is 68.

The spelling of 198756809159 in words is "one hundred ninety-eight billion, seven hundred fifty-six million, eight hundred nine thousand, one hundred fifty-nine".