671117511863 has 2 divisors, whose sum is σ = 671117511864. Its totient is φ = 671117511862.

The previous prime is 671117511851. The next prime is 671117511893. The reversal of 671117511863 is 368115711176.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 671117511863 - 2¹⁶ = 671117446327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671117511893) 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, 335558755931 + 335558755932.

It is an arithmetic number, because the mean of its divisors is an integer number (335558755932).

Almost surely, 2^671117511863 is an apocalyptic number.

671117511863 is a deficient number, since it is larger than the sum of its proper divisors (1).

671117511863 is an equidigital number, since it uses as much as digits as its factorization.

671117511863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211680, while the sum is 47.

The spelling of 671117511863 in words is "six hundred seventy-one billion, one hundred seventeen million, five hundred eleven thousand, eight hundred sixty-three".