12724687426 has 32 divisors (see below), whose sum is σ = 21390656256. Its totient is φ = 5674754800.

The previous prime is 12724687387. The next prime is 12724687433. The reversal of 12724687426 is 62478642721.

12724687426 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 12724687426.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 95991 + ... + 186181.

It is an arithmetic number, because the mean of its divisors is an integer number (668458008).

Almost surely, 2^12724687426 is an apocalyptic number.

12724687426 is a deficient number, since it is larger than the sum of its proper divisors (8665968830).

12724687426 is an equidigital number, since it uses as much as digits as its factorization.

12724687426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90279 (or 90257 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 49.

The spelling of 12724687426 in words is "twelve billion, seven hundred twenty-four million, six hundred eighty-seven thousand, four hundred twenty-six".