12926978539 has 4 divisors (see below), whose sum is σ = 12951790920. Its totient is φ = 12902166160.

The previous prime is 12926978447. The next prime is 12926978543. The reversal of 12926978539 is 93587962921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12926978539 - 2²⁵ = 12893424107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12926978569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12405409 + ... + 12406450.

It is an arithmetic number, because the mean of its divisors is an integer number (3237947730).

Almost surely, 2^12926978539 is an apocalyptic number.

12926978539 is a deficient number, since it is larger than the sum of its proper divisors (24812381).

12926978539 is an equidigital number, since it uses as much as digits as its factorization.

12926978539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24812380.

The product of its digits is 14696640, while the sum is 61.

The spelling of 12926978539 in words is "twelve billion, nine hundred twenty-six million, nine hundred seventy-eight thousand, five hundred thirty-nine".