686843586563 has 2 divisors, whose sum is σ = 686843586564. Its totient is φ = 686843586562.

The previous prime is 686843586529. The next prime is 686843586571. The reversal of 686843586563 is 365685348686.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 686843586563 - 2⁸ = 686843586307 is a prime.

It is a super-2 number, since 2×686843586563² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 686843586493 and 686843586502.

It is not a weakly prime, because it can be changed into another prime (686843586523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343421793281 + 343421793282.

It is an arithmetic number, because the mean of its divisors is an integer number (343421793282).

Almost surely, 2^686843586563 is an apocalyptic number.

686843586563 is a deficient number, since it is larger than the sum of its proper divisors (1).

686843586563 is an equidigital number, since it uses as much as digits as its factorization.

686843586563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 597196800, while the sum is 68.

The spelling of 686843586563 in words is "six hundred eighty-six billion, eight hundred forty-three million, five hundred eighty-six thousand, five hundred sixty-three".