199385185108 has 12 divisors (see below), whose sum is σ = 349139337652. Its totient is φ = 99631088640.

The previous prime is 199385185099. The next prime is 199385185127. The reversal of 199385185108 is 801581583991.

199385185108 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 180954950544 + 18430234564 = 425388^2 + 135758^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 15368685 + ... + 15381652.

Almost surely, 2^199385185108 is an apocalyptic number.

It is an amenable number.

199385185108 is a deficient number, since it is larger than the sum of its proper divisors (149754152544).

199385185108 is a wasteful number, since it uses less digits than its factorization.

199385185108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30751962 (or 30751960 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 58.

The spelling of 199385185108 in words is "one hundred ninety-nine billion, three hundred eighty-five million, one hundred eighty-five thousand, one hundred eight".