199800510208 has 36 divisors (see below), whose sum is σ = 429499060648. Its totient is φ = 92215618560.

The previous prime is 199800510197. The next prime is 199800510209. The reversal of 199800510208 is 802015008991.

It is a super-2 number, since 2×199800510208² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199800510209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30014778 + ... + 30021433.

Almost surely, 2^199800510208 is an apocalyptic number.

It is an amenable number.

199800510208 is an abundant number, since it is smaller than the sum of its proper divisors (229698550440).

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

199800510208 is an equidigital number, since it uses as much as digits as its factorization.

199800510208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60036240 (or 60036226 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 43.

The spelling of 199800510208 in words is "one hundred ninety-nine billion, eight hundred million, five hundred ten thousand, two hundred eight".