199818199999836 has 96 divisors (see below), whose sum is σ = 565757340556800. Its totient is φ = 60485081477760.

The previous prime is 199818199999829. The next prime is 199818199999841. The reversal of 199818199999836 is 638999991818991.

199818199999836 is a `hidden beast` number, since 199 + 81 + 81 + 99 + 99 + 98 + 3 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (99).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 90419185 + ... + 92602728.

It is an arithmetic number, because the mean of its divisors is an integer number (5893305630800).

Almost surely, 2^{199818199999836} is an apocalyptic number.

It is an amenable number.

199818199999836 is an abundant number, since it is smaller than the sum of its proper divisors (365939140556964).

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

199818199999836 is a wasteful number, since it uses less digits than its factorization.

199818199999836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183022856 (or 183022848 counting only the distinct ones).

The product of its digits is 44079842304, while the sum is 99.

The spelling of 199818199999836 in words is "one hundred ninety-nine trillion, eight hundred eighteen billion, one hundred ninety-nine million, nine hundred ninety-nine thousand, eight hundred thirty-six".