198183769808166 has 48 divisors (see below), whose sum is σ = 439892216028720. Its totient is φ = 64446940938240.

The previous prime is 198183769808153. The next prime is 198183769808209. The reversal of 198183769808166 is 661808967381891.

198183769808166 is a `hidden beast` number, since 1 + 9 + 8 + 1 + 8 + 376 + 9 + 80 + 8 + 166 = 666.

It is a super-2 number, since 2×198183769808166² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9165606 + ... + 21917478.

It is an arithmetic number, because the mean of its divisors is an integer number (9164421167265).

Almost surely, 2^{198183769808166} is an apocalyptic number.

198183769808166 is an abundant number, since it is smaller than the sum of its proper divisors (241708446220554).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

198183769808166 is a wasteful number, since it uses less digits than its factorization.

198183769808166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12772981 (or 12772978 counting only the distinct ones).

The product of its (nonzero) digits is 1504935936, while the sum is 81.

The spelling of 198183769808166 in words is "one hundred ninety-eight trillion, one hundred eighty-three billion, seven hundred sixty-nine million, eight hundred eight thousand, one hundred sixty-six".