16416642642817 has 2 divisors, whose sum is σ = 16416642642818. Its totient is φ = 16416642642816.

The previous prime is 16416642642769. The next prime is 16416642642839. The reversal of 16416642642817 is 71824624661461.

16416642642817 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., 16357203715216 + 59438927601 = 4044404^2 + 243801^2 .

It is a cyclic number.

It is not a de Polignac number, because 16416642642817 - 2²⁷ = 16416508425089 is a prime.

It is not a weakly prime, because it can be changed into another prime (16416642642317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8208321321408 + 8208321321409.

It is an arithmetic number, because the mean of its divisors is an integer number (8208321321409).

Almost surely, 2^{16416642642817} is an apocalyptic number.

It is an amenable number.

16416642642817 is a deficient number, since it is larger than the sum of its proper divisors (1).

16416642642817 is an equidigital number, since it uses as much as digits as its factorization.

16416642642817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18579456, while the sum is 58.

The spelling of 16416642642817 in words is "sixteen trillion, four hundred sixteen billion, six hundred forty-two million, six hundred forty-two thousand, eight hundred seventeen".