12939578818243 has 48 divisors (see below), whose sum is σ = 16928469828864. Its totient is φ = 9772975477440.

The previous prime is 12939578818217. The next prime is 12939578818249. The reversal of 12939578818243 is 34281887593921.

It is not a de Polignac number, because 12939578818243 - 2⁹ = 12939578817731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12939578818249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4011496 + ... + 6478522.

It is an arithmetic number, because the mean of its divisors is an integer number (352676454768).

Almost surely, 2^{12939578818243} is an apocalyptic number.

12939578818243 is a deficient number, since it is larger than the sum of its proper divisors (3988891010621).

12939578818243 is a wasteful number, since it uses less digits than its factorization.

12939578818243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2467352 (or 2467345 counting only the distinct ones).

The product of its digits is 209018880, while the sum is 70.

The spelling of 12939578818243 in words is "twelve trillion, nine hundred thirty-nine billion, five hundred seventy-eight million, eight hundred eighteen thousand, two hundred forty-three".