11673640809 has 32 divisors (see below), whose sum is σ = 17443111680. Its totient is φ = 7715606400.

The previous prime is 11673640799. The next prime is 11673640813. The reversal of 11673640809 is 90804637611.

It is a happy number.

It is not a de Polignac number, because 11673640809 - 2¹⁵ = 11673608041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11673640009) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3812139 + ... + 3815199.

It is an arithmetic number, because the mean of its divisors is an integer number (545097240).

Almost surely, 2^11673640809 is an apocalyptic number.

It is an amenable number.

11673640809 is a deficient number, since it is larger than the sum of its proper divisors (5769470871).

11673640809 is a wasteful number, since it uses less digits than its factorization.

11673640809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4238 (or 4232 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 11673640809 in words is "eleven billion, six hundred seventy-three million, six hundred forty thousand, eight hundred nine".