13440000009 has 24 divisors (see below), whose sum is σ = 18610102528. Its totient is φ = 8625342240.

The previous prime is 13439999987. The next prime is 13440000019. The reversal of 13440000009 is 90000004431.

It is not a de Polignac number, because 13440000009 - 2²⁰ = 13438951433 is a prime.

It is a super-4 number, since 4×13440000009⁴ (a number of 42 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13440000009.

It is not an unprimeable number, because it can be changed into a prime (13440000019) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 387624 + ... + 420870.

Almost surely, 2^13440000009 is an apocalyptic number.

It is an amenable number.

13440000009 is a deficient number, since it is larger than the sum of its proper divisors (5170102519).

13440000009 is an equidigital number, since it uses as much as digits as its factorization.

13440000009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33405 (or 33358 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The spelling of 13440000009 in words is "thirteen billion, four hundred forty million, nine", and thus it is an aban number.