11140169209 has 27 divisors (see below), whose sum is σ = 12646130637. Its totient is φ = 9808271616.

The previous prime is 11140169203. The next prime is 11140169213. The reversal of 11140169209 is 90296104111.

The square root of 11140169209 is 105547.

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

11140169209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2420344809 + 8719824400 = 49197^2 + 93380^2 .

It is not a de Polignac number, because 11140169209 - 2²⁹ = 10603298297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11140169203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 31558377 + ... + 31558729.

Almost surely, 2^11140169209 is an apocalyptic number.

11140169209 is the 105547-th square number.

11140169209 is the 52774-th centered octagonal number.

It is an amenable number.

11140169209 is a deficient number, since it is larger than the sum of its proper divisors (1505961428).

11140169209 is an frugal number, since it uses more digits than its factorization.

11140169209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778 (or 389 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 34.

The spelling of 11140169209 in words is "eleven billion, one hundred forty million, one hundred sixty-nine thousand, two hundred nine".