199718189069 has 8 divisors (see below), whose sum is σ = 228253363200. Its totient is φ = 171184016016.

The previous prime is 199718188997. The next prime is 199718189081. The reversal of 199718189069 is 960981817991.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199718189069 is a prime.

It is a super-2 number, since 2×199718189069² (a number of 23 digits) 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 (199718189089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241727 + ... + 676659.

It is an arithmetic number, because the mean of its divisors is an integer number (28531670400).

Almost surely, 2^199718189069 is an apocalyptic number.

It is an amenable number.

199718189069 is a deficient number, since it is larger than the sum of its proper divisors (28535174131).

199718189069 is an equidigital number, since it uses as much as digits as its factorization.

199718189069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500539.

The product of its (nonzero) digits is 17635968, while the sum is 68.

The spelling of 199718189069 in words is "one hundred ninety-nine billion, seven hundred eighteen million, one hundred eighty-nine thousand, sixty-nine".