198568940185 has 16 divisors (see below), whose sum is σ = 297079765632. Its totient is φ = 123783235200.

The previous prime is 198568940183. The next prime is 198568940189. The reversal of 198568940185 is 581049865891.

198568940185 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 198568940185 - 2¹ = 198568940183 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198568940183) 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 in 15 ways as a sum of consecutive naturals, for example, 257881356 + ... + 257882125.

It is an arithmetic number, because the mean of its divisors is an integer number (18567485352).

Almost surely, 2^198568940185 is an apocalyptic number.

It is an amenable number.

198568940185 is a deficient number, since it is larger than the sum of its proper divisors (98510825447).

198568940185 is a wasteful number, since it uses less digits than its factorization.

198568940185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515763504.

The product of its (nonzero) digits is 24883200, while the sum is 64.

The spelling of 198568940185 in words is "one hundred ninety-eight billion, five hundred sixty-eight million, nine hundred forty thousand, one hundred eighty-five".