199680855 has 24 divisors (see below), whose sum is σ = 351177456. Its totient is φ = 96814080.

The previous prime is 199680851. The next prime is 199680857. The reversal of 199680855 is 558086991.

It is not a de Polignac number, because 199680855 - 2² = 199680851 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 199680798 and 199680807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199680851) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53194 + ... + 56823.

It is an arithmetic number, because the mean of its divisors is an integer number (14632394).

Almost surely, 2^199680855 is an apocalyptic number.

199680855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

199680855 is a deficient number, since it is larger than the sum of its proper divisors (151496601).

199680855 is a wasteful number, since it uses less digits than its factorization.

199680855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110047 (or 110036 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 51.

The square root of 199680855 is about 14130.8476391192. The cubic root of 199680855 is about 584.4923201590.

The spelling of 199680855 in words is "one hundred ninety-nine million, six hundred eighty thousand, eight hundred fifty-five".