199663855 has 8 divisors (see below), whose sum is σ = 239787792. Its totient is φ = 159603648.

The previous prime is 199663853. The next prime is 199663907. The reversal of 199663855 is 558366991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 199663855 - 2¹ = 199663853 is a prime.

It is a super-2 number, since 2×199663855² = 79731309986922050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199663853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8742 + ... + 21811.

It is an arithmetic number, because the mean of its divisors is an integer number (29973474).

Almost surely, 2^199663855 is an apocalyptic number.

199663855 is a deficient number, since it is larger than the sum of its proper divisors (40123937).

199663855 is a wasteful number, since it uses less digits than its factorization.

199663855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31865.

The product of its digits is 1749600, while the sum is 52.

The square root of 199663855 is about 14130.2461054293. The cubic root of 199663855 is about 584.4757326041.

The spelling of 199663855 in words is "one hundred ninety-nine million, six hundred sixty-three thousand, eight hundred fifty-five".