12809871423 has 12 divisors (see below), whose sum is σ = 18507162960. Its totient is φ = 8538061056.

The previous prime is 12809871419. The next prime is 12809871469. The reversal of 12809871423 is 32417890821.

It is a happy number.

It is not a de Polignac number, because 12809871423 - 2² = 12809871419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12809871493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109986 + ... + 194207.

It is an arithmetic number, because the mean of its divisors is an integer number (1542263580).

Almost surely, 2^12809871423 is an apocalyptic number.

12809871423 is a deficient number, since it is larger than the sum of its proper divisors (5697291537).

12809871423 is a wasteful number, since it uses less digits than its factorization.

12809871423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308878 (or 308875 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The spelling of 12809871423 in words is "twelve billion, eight hundred nine million, eight hundred seventy-one thousand, four hundred twenty-three".