1686204848663 has 2 divisors, whose sum is σ = 1686204848664. Its totient is φ = 1686204848662.

The previous prime is 1686204848567. The next prime is 1686204848701. The reversal of 1686204848663 is 3668484026861.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1686204848663 is a prime.

It is a super-2 number, since 2×1686204848663² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1686204848596 and 1686204848605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1686204848863) 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 as a sum of consecutive naturals, namely, 843102424331 + 843102424332.

It is an arithmetic number, because the mean of its divisors is an integer number (843102424332).

Almost surely, 2^{1686204848663} is an apocalyptic number.

1686204848663 is a deficient number, since it is larger than the sum of its proper divisors (1).

1686204848663 is an equidigital number, since it uses as much as digits as its factorization.

1686204848663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63700992, while the sum is 62.

The spelling of 1686204848663 in words is "one trillion, six hundred eighty-six billion, two hundred four million, eight hundred forty-eight thousand, six hundred sixty-three".