12235646909 has 4 divisors (see below), whose sum is σ = 12257380416. Its totient is φ = 12213913404.

The previous prime is 12235646849. The next prime is 12235646921. The reversal of 12235646909 is 90964653221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12235646909 - 2²⁸ = 11967211453 is a prime.

It is a super-2 number, since 2×12235646909² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12235646209) 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, 10865909 + ... + 10867034.

It is an arithmetic number, because the mean of its divisors is an integer number (3064345104).

Almost surely, 2^12235646909 is an apocalyptic number.

It is an amenable number.

12235646909 is a deficient number, since it is larger than the sum of its proper divisors (21733507).

12235646909 is an equidigital number, since it uses as much as digits as its factorization.

12235646909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21733506.

The product of its (nonzero) digits is 699840, while the sum is 47.

The spelling of 12235646909 in words is "twelve billion, two hundred thirty-five million, six hundred forty-six thousand, nine hundred nine".