16865664911 has 2 divisors, whose sum is σ = 16865664912. Its totient is φ = 16865664910.

The previous prime is 16865664901. The next prime is 16865664913. The reversal of 16865664911 is 11946656861.

It is a strong prime.

It is an emirp because it is prime and its reverse (11946656861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16865664911 - 2¹⁰ = 16865663887 is a prime.

Together with 16865664913, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16865664913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8432832455 + 8432832456.

It is an arithmetic number, because the mean of its divisors is an integer number (8432832456).

Almost surely, 2^16865664911 is an apocalyptic number.

16865664911 is a deficient number, since it is larger than the sum of its proper divisors (1).

16865664911 is an equidigital number, since it uses as much as digits as its factorization.

16865664911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1866240, while the sum is 53.

The spelling of 16865664911 in words is "sixteen billion, eight hundred sixty-five million, six hundred sixty-four thousand, nine hundred eleven".