199681086902 has 16 divisors (see below), whose sum is σ = 330422230800. Its totient is φ = 89744307840.

The previous prime is 199681086833. The next prime is 199681086907. The reversal of 199681086902 is 209680186991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199681086907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50989127 + ... + 50993042.

It is an arithmetic number, because the mean of its divisors is an integer number (20651389425).

Almost surely, 2^199681086902 is an apocalyptic number.

199681086902 is a deficient number, since it is larger than the sum of its proper divisors (130741143898).

199681086902 is a wasteful number, since it uses less digits than its factorization.

199681086902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101982271.

The product of its (nonzero) digits is 3359232, while the sum is 59.

The spelling of 199681086902 in words is "one hundred ninety-nine billion, six hundred eighty-one million, eighty-six thousand, nine hundred two".