199466744689 has 9 divisors (see below), whose sum is σ = 206123024601. Its totient is φ = 193018935060.

The previous prime is 199466744651. The next prime is 199466744693. The reversal of 199466744689 is 986447664991.

The square root of 199466744689 is 446617.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 199466744689 - 2¹⁵ = 199466711921 is a prime.

It is a super-3 number, since 3×199466744689³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199466744089) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 13837924 + ... + 13852330.

It is an arithmetic number, because the mean of its divisors is an integer number (22902558289).

Almost surely, 2^199466744689 is an apocalyptic number.

199466744689 is the 446617-th square number.

199466744689 is the 223309-th centered octagonal number.

It is an amenable number.

199466744689 is a deficient number, since it is larger than the sum of its proper divisors (6656279912).

199466744689 is an frugal number, since it uses more digits than its factorization.

199466744689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28876 (or 14438 counting only the distinct ones).

The product of its digits is 564350976, while the sum is 73.

The spelling of 199466744689 in words is "one hundred ninety-nine billion, four hundred sixty-six million, seven hundred forty-four thousand, six hundred eighty-nine".