11699019866689 has 27 divisors (see below), whose sum is σ = 12510687321193. Its totient is φ = 10937782846592.

The previous prime is 11699019866627. The next prime is 11699019866713. The reversal of 11699019866689 is 98666891099611.

The square root of 11699019866689 is 3420383.

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

It can be written as a sum of positive squares in 4 ways, for example, as 5734190576689 + 5964829290000 = 2394617^2 + 2442300^2 .

It is a de Polignac number, because none of the positive numbers 2^k-11699019866689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11699019869689) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 10059345822 + ... + 10059346984.

Almost surely, 2^{11699019866689} is an apocalyptic number.

11699019866689 is the 3420383-rd square number.

11699019866689 is the 1710192-nd centered octagonal number.

It is an amenable number.

11699019866689 is a deficient number, since it is larger than the sum of its proper divisors (811667454504).

11699019866689 is an frugal number, since it uses more digits than its factorization.

11699019866689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2706 (or 1353 counting only the distinct ones).

The product of its (nonzero) digits is 544195584, while the sum is 79.

The spelling of 11699019866689 in words is "eleven trillion, six hundred ninety-nine billion, nineteen million, eight hundred sixty-six thousand, six hundred eighty-nine".