12043209609 has 6 divisors (see below), whose sum is σ = 17395747226. Its totient is φ = 8028806400.

The previous prime is 12043209551. The next prime is 12043209617. The reversal of 12043209609 is 90690234021.

12043209609 is a `hidden beast` number, since 1 + 2 + 0 + 43 + 2 + 0 + 9 + 609 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12040233984 + 2975625 = 109728^2 + 1725^2 .

It is not a de Polignac number, because 12043209609 - 2⁹ = 12043209097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12043209209) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 669067192 + ... + 669067209.

Almost surely, 2^12043209609 is an apocalyptic number.

It is an amenable number.

12043209609 is a deficient number, since it is larger than the sum of its proper divisors (5352537617).

12043209609 is a wasteful number, since it uses less digits than its factorization.

12043209609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1338134407 (or 1338134404 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The spelling of 12043209609 in words is "twelve billion, forty-three million, two hundred nine thousand, six hundred nine".