199999641782108 has 36 divisors (see below), whose sum is σ = 407159980824240. Its totient is φ = 85710373684992.

The previous prime is 199999641782089. The next prime is 199999641782153. The reversal of 199999641782108 is 801287146999991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17888528 + ... + 26832791.

It is an arithmetic number, because the mean of its divisors is an integer number (11309999467340).

Almost surely, 2^{199999641782108} is an apocalyptic number.

It is an amenable number.

199999641782108 is an abundant number, since it is smaller than the sum of its proper divisors (207160339042132).

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

199999641782108 is a wasteful number, since it uses less digits than its factorization.

199999641782108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44744154 (or 44744145 counting only the distinct ones).

The product of its (nonzero) digits is 1269789696, while the sum is 83.

The spelling of 199999641782108 in words is "one hundred ninety-nine trillion, nine hundred ninety-nine billion, six hundred forty-one million, seven hundred eighty-two thousand, one hundred eight".