16505211017 has 2 divisors, whose sum is σ = 16505211018. Its totient is φ = 16505211016.

The previous prime is 16505210993. The next prime is 16505211029. The reversal of 16505211017 is 71011250561.

16505211017 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12652650256 + 3852560761 = 112484^2 + 62069^2 .

It is a cyclic number.

It is not a de Polignac number, because 16505211017 - 2¹⁴ = 16505194633 is a prime.

It is not a weakly prime, because it can be changed into another prime (16505211067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8252605508 + 8252605509.

It is an arithmetic number, because the mean of its divisors is an integer number (8252605509).

Almost surely, 2^16505211017 is an apocalyptic number.

It is an amenable number.

16505211017 is a deficient number, since it is larger than the sum of its proper divisors (1).

16505211017 is an equidigital number, since it uses as much as digits as its factorization.

16505211017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2100, while the sum is 29.

Adding to 16505211017 its reverse (71011250561), we get a palindrome (87516461578).

The spelling of 16505211017 in words is "sixteen billion, five hundred five million, two hundred eleven thousand, seventeen".