199216709999 has 4 divisors (see below), whose sum is σ = 200649923880. Its totient is φ = 197783496120.

The previous prime is 199216709969. The next prime is 199216710061. The reversal of 199216709999 is 999907612991.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 199216709999 - 2¹⁶ = 199216644463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199216709929) 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, 716606732 + ... + 716607009.

It is an arithmetic number, because the mean of its divisors is an integer number (50162480970).

Almost surely, 2^199216709999 is an apocalyptic number.

199216709999 is a deficient number, since it is larger than the sum of its proper divisors (1433213881).

199216709999 is a wasteful number, since it uses less digits than its factorization.

199216709999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1433213880.

The product of its (nonzero) digits is 44641044, while the sum is 71.

The spelling of 199216709999 in words is "one hundred ninety-nine billion, two hundred sixteen million, seven hundred nine thousand, nine hundred ninety-nine".