16864317871 has 2 divisors, whose sum is σ = 16864317872. Its totient is φ = 16864317870.

The previous prime is 16864317857. The next prime is 16864317889. The reversal of 16864317871 is 17871346861.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (17871346861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16864317871 - 2⁵ = 16864317839 is a prime.

It is a super-3 number, since 3×16864317871³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16864317571) 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, 8432158935 + 8432158936.

It is an arithmetic number, because the mean of its divisors is an integer number (8432158936).

Almost surely, 2^16864317871 is an apocalyptic number.

16864317871 is a deficient number, since it is larger than the sum of its proper divisors (1).

16864317871 is an equidigital number, since it uses as much as digits as its factorization.

16864317871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1354752, while the sum is 52.

The spelling of 16864317871 in words is "sixteen billion, eight hundred sixty-four million, three hundred seventeen thousand, eight hundred seventy-one".