12631421643 has 16 divisors (see below), whose sum is σ = 16969895040. Its totient is φ = 8356997376.

The previous prime is 12631421633. The next prime is 12631421657. The reversal of 12631421643 is 34612413621.

It is a happy number.

12631421643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12631421643 - 2⁵ = 12631421611 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12631421623) by changing a digit.

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, 1441371 + ... + 1450107.

It is an arithmetic number, because the mean of its divisors is an integer number (1060618440).

Almost surely, 2^12631421643 is an apocalyptic number.

12631421643 is a deficient number, since it is larger than the sum of its proper divisors (4338473397).

12631421643 is a wasteful number, since it uses less digits than its factorization.

12631421643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12346.

The product of its digits is 20736, while the sum is 33.

The spelling of 12631421643 in words is "twelve billion, six hundred thirty-one million, four hundred twenty-one thousand, six hundred forty-three".