199691700000 has 288 divisors, whose sum is σ = 705609963072. Its totient is φ = 49153920000.

The previous prime is 199691699993. The next prime is 199691700011. The reversal of 199691700000 is 7196991.

199691700000 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3874399 + ... + 3925601.

It is an arithmetic number, because the mean of its divisors is an integer number (2450034594).

Almost surely, 2^199691700000 is an apocalyptic number.

199691700000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 199691700000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (352804981536).

199691700000 is an abundant number, since it is smaller than the sum of its proper divisors (505918263072).

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

199691700000 is an equidigital number, since it uses as much as digits as its factorization.

199691700000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51254 (or 51226 counting only the distinct ones).

The product of its (nonzero) digits is 30618, while the sum is 42.

Adding to 199691700000 its reverse (7196991), we get a palindrome (199698896991).

The spelling of 199691700000 in words is "one hundred ninety-nine billion, six hundred ninety-one million, seven hundred thousand".