11609416009 has 3 divisors (see below), whose sum is σ = 11609523757. Its totient is φ = 11609308262.

The previous prime is 11609416003. The next prime is 11609416033. The reversal of 11609416009 is 90061490611.

The square root of 11609416009 is 107747.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 90061490611 = 461 ⋅195361151.

It is not a de Polignac number, because 11609416009 - 2³ = 11609416001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11609416001) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 53874 + ... + 161620.

Almost surely, 2^11609416009 is an apocalyptic number.

11609416009 is the 107747-th square number.

11609416009 is the 53874-th centered octagonal number.

It is an amenable number.

11609416009 is a deficient number, since it is larger than the sum of its proper divisors (107748).

11609416009 is an frugal number, since it uses more digits than its factorization.

11609416009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215494 (or 107747 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 37.

Multiplying 11609416009 by its product of nonzero digits (11664), we get a square (135412228328976 = 11636676²).

The spelling of 11609416009 in words is "eleven billion, six hundred nine million, four hundred sixteen thousand, nine".