1683641211817 has 2 divisors, whose sum is σ = 1683641211818. Its totient is φ = 1683641211816.

The previous prime is 1683641211809. The next prime is 1683641211827. The reversal of 1683641211817 is 7181121463861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1665039252496 + 18601959321 = 1290364^2 + 136389^2 .

It is a cyclic number.

It is not a de Polignac number, because 1683641211817 - 2³ = 1683641211809 is a prime.

It is not a weakly prime, because it can be changed into another prime (1683641211827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 841820605908 + 841820605909.

It is an arithmetic number, because the mean of its divisors is an integer number (841820605909).

Almost surely, 2^{1683641211817} is an apocalyptic number.

It is an amenable number.

1683641211817 is a deficient number, since it is larger than the sum of its proper divisors (1).

1683641211817 is an equidigital number, since it uses as much as digits as its factorization.

1683641211817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 387072, while the sum is 49.

The spelling of 1683641211817 in words is "one trillion, six hundred eighty-three billion, six hundred forty-one million, two hundred eleven thousand, eight hundred seventeen".