11809326049 has 4 divisors (see below), whose sum is σ = 12002921620. Its totient is φ = 11615730480.

The previous prime is 11809326047. The next prime is 11809326059. The reversal of 11809326049 is 94062390811.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 882387025 + 10926939024 = 29705^2 + 104532^2 .

It is a cyclic number.

It is not a de Polignac number, because 11809326049 - 2¹ = 11809326047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11809325996 and 11809326014.

It is not an unprimeable number, because it can be changed into a prime (11809326041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96797694 + ... + 96797815.

It is an arithmetic number, because the mean of its divisors is an integer number (3000730405).

Almost surely, 2^11809326049 is an apocalyptic number.

It is an amenable number.

11809326049 is a deficient number, since it is larger than the sum of its proper divisors (193595571).

11809326049 is an equidigital number, since it uses as much as digits as its factorization.

11809326049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193595570.

The product of its (nonzero) digits is 93312, while the sum is 43.

The spelling of 11809326049 in words is "eleven billion, eight hundred nine million, three hundred twenty-six thousand, forty-nine".