12756978423 has 96 divisors (see below), whose sum is σ = 23071293440. Its totient is φ = 6628184640.

The previous prime is 12756978389. The next prime is 12756978439. The reversal of 12756978423 is 32487965721.

It is a happy number.

12756978423 is a `hidden beast` number, since 1 + 2 + 7 + 569 + 78 + 4 + 2 + 3 = 666.

12756978423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12756978423 - 2¹⁴ = 12756962039 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12756978423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12756978523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4711236 + ... + 4713942.

Almost surely, 2^12756978423 is an apocalyptic number.

12756978423 is a deficient number, since it is larger than the sum of its proper divisors (10314315017).

12756978423 is a wasteful number, since it uses less digits than its factorization.

12756978423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2897 (or 2894 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 54.

The spelling of 12756978423 in words is "twelve billion, seven hundred fifty-six million, nine hundred seventy-eight thousand, four hundred twenty-three".