16505206411 has 2 divisors, whose sum is σ = 16505206412. Its totient is φ = 16505206410.

The previous prime is 16505206409. The next prime is 16505206477. The reversal of 16505206411 is 11460250561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16505206411 - 2¹ = 16505206409 is a prime.

Together with 16505206409, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (16502206411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8252603205 + 8252603206.

It is an arithmetic number, because the mean of its divisors is an integer number (8252603206).

Almost surely, 2^16505206411 is an apocalyptic number.

16505206411 is a deficient number, since it is larger than the sum of its proper divisors (1).

16505206411 is an equidigital number, since it uses as much as digits as its factorization.

16505206411 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 31.

Adding to 16505206411 its reverse (11460250561), we get a palindrome (27965456972).

The spelling of 16505206411 in words is "sixteen billion, five hundred five million, two hundred six thousand, four hundred eleven".