12631336643 has 2 divisors, whose sum is σ = 12631336644. Its totient is φ = 12631336642.

The previous prime is 12631336631. The next prime is 12631336661. The reversal of 12631336643 is 34663313621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12631336643 - 2¹⁴ = 12631320259 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12631336597 and 12631336606.

It is not a weakly prime, because it can be changed into another prime (12631333643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6315668321 + 6315668322.

It is an arithmetic number, because the mean of its divisors is an integer number (6315668322).

Almost surely, 2^12631336643 is an apocalyptic number.

12631336643 is a deficient number, since it is larger than the sum of its proper divisors (1).

12631336643 is an equidigital number, since it uses as much as digits as its factorization.

12631336643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 38.

The spelling of 12631336643 in words is "twelve billion, six hundred thirty-one million, three hundred thirty-six thousand, six hundred forty-three".