12323778869 has 4 divisors (see below), whose sum is σ = 12334487040. Its totient is φ = 12313070700.

The previous prime is 12323778853. The next prime is 12323778877. The reversal of 12323778869 is 96887732321.

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, and also an emirpimes, since its reverse is a distinct semiprime: 96887732321 = 739 ⋅131106539.

It is a cyclic number.

It is not a de Polignac number, because 12323778869 - 2⁴ = 12323778853 is a prime.

It is a super-2 number, since 2×12323778869² (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 (12323778569) 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, 5352359 + ... + 5354660.

It is an arithmetic number, because the mean of its divisors is an integer number (3083621760).

Almost surely, 2^12323778869 is an apocalyptic number.

It is an amenable number.

12323778869 is a deficient number, since it is larger than the sum of its proper divisors (10708171).

12323778869 is a wasteful number, since it uses less digits than its factorization.

12323778869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10708170.

The product of its digits is 6096384, while the sum is 56.

The spelling of 12323778869 in words is "twelve billion, three hundred twenty-three million, seven hundred seventy-eight thousand, eight hundred sixty-nine".