1643317489213 has 2 divisors, whose sum is σ = 1643317489214. Its totient is φ = 1643317489212.

The previous prime is 1643317489147. The next prime is 1643317489217. The reversal of 1643317489213 is 3129847133461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 878415068644 + 764902420569 = 937238^2 + 874587^2 .

It is a cyclic number.

It is not a de Polignac number, because 1643317489213 - 2¹⁷ = 1643317358141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1643317489217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 821658744606 + 821658744607.

It is an arithmetic number, because the mean of its divisors is an integer number (821658744607).

Almost surely, 2^{1643317489213} is an apocalyptic number.

It is an amenable number.

1643317489213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1643317489213 is an equidigital number, since it uses as much as digits as its factorization.

1643317489213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2612736, while the sum is 52.

The spelling of 1643317489213 in words is "one trillion, six hundred forty-three billion, three hundred seventeen million, four hundred eighty-nine thousand, two hundred thirteen".