11055891609 has 45 divisors (see below), whose sum is σ = 19223532207. Its totient is φ = 6313867056.

The previous prime is 11055891607. The next prime is 11055891619. The reversal of 11055891609 is 90619855011.

The square root of 11055891609 is 105147.

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

11055891609 is a `hidden beast` number, since 1 + 1 + 0 + 5 + 589 + 1 + 60 + 9 = 666.

11055891609 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 only one way, i.e., 5897779209 + 5158112400 = 76797^2 + 71820^2 .

It is not a de Polignac number, because 11055891609 - 2¹ = 11055891607 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11055891601) 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 44 ways as a sum of consecutive naturals, for example, 6623427 + ... + 6625095.

Almost surely, 2^11055891609 is an apocalyptic number.

11055891609 is the 105147-th square number.

11055891609 is the 52574-th centered octagonal number.

It is an amenable number.

11055891609 is a deficient number, since it is larger than the sum of its proper divisors (8167640598).

11055891609 is an frugal number, since it uses more digits than its factorization.

11055891609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3364 (or 1679 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 45.

The spelling of 11055891609 in words is "eleven billion, fifty-five million, eight hundred ninety-one thousand, six hundred nine".