199861168 has 40 divisors (see below), whose sum is σ = 435159648. Its totient is φ = 88230912.

The previous prime is 199861153. The next prime is 199861169. The reversal of 199861168 is 861168991.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (199861169) 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, 16105 + ... + 25672.

Almost surely, 2^199861168 is an apocalyptic number.

It is an amenable number.

199861168 is an abundant number, since it is smaller than the sum of its proper divisors (235298480).

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

199861168 is a wasteful number, since it uses less digits than its factorization.

199861168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41821 (or 41815 counting only the distinct ones).

The product of its digits is 186624, while the sum is 49.

The square root of 199861168 is about 14137.2263191901. The cubic root of 199861168 is about 584.6682005767.

The spelling of 199861168 in words is "one hundred ninety-nine million, eight hundred sixty-one thousand, one hundred sixty-eight".