6386944945643 has 2 divisors, whose sum is σ = 6386944945644. Its totient is φ = 6386944945642.

The previous prime is 6386944945559. The next prime is 6386944945663. The reversal of 6386944945643 is 3465494496836.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6386944945643 - 2¹⁰ = 6386944944619 is a prime.

It is not a weakly prime, because it can be changed into another prime (6386944945663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3193472472821 + 3193472472822.

It is an arithmetic number, because the mean of its divisors is an integer number (3193472472822).

Almost surely, 2^{6386944945643} is an apocalyptic number.

6386944945643 is a deficient number, since it is larger than the sum of its proper divisors (1).

6386944945643 is an equidigital number, since it uses as much as digits as its factorization.

6386944945643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1612431360, while the sum is 71.

The spelling of 6386944945643 in words is "six trillion, three hundred eighty-six billion, nine hundred forty-four million, nine hundred forty-five thousand, six hundred forty-three".