12821937579 has 32 divisors (see below), whose sum is σ = 20729383680. Its totient is φ = 7768224000.

The previous prime is 12821937571. The next prime is 12821937589. The reversal of 12821937579 is 97573912821.

It is a happy number.

12821937579 is a `hidden beast` number, since 1 + 28 + 2 + 19 + 37 + 579 = 666.

It is not a de Polignac number, because 12821937579 - 2³ = 12821937571 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12821937571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1197819 + ... + 1208475.

It is an arithmetic number, because the mean of its divisors is an integer number (647793240).

Almost surely, 2^12821937579 is an apocalyptic number.

12821937579 is a deficient number, since it is larger than the sum of its proper divisors (7907446101).

12821937579 is a wasteful number, since it uses less digits than its factorization.

12821937579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14728 (or 14722 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 54.

The spelling of 12821937579 in words is "twelve billion, eight hundred twenty-one million, nine hundred thirty-seven thousand, five hundred seventy-nine".