16688517017 has 2 divisors, whose sum is σ = 16688517018. Its totient is φ = 16688517016.

The previous prime is 16688516969. The next prime is 16688517047. The reversal of 16688517017 is 71071588661.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15800238601 + 888278416 = 125699^2 + 29804^2 .

It is a cyclic number.

It is not a de Polignac number, because 16688517017 - 2⁶ = 16688516953 is a prime.

It is not a weakly prime, because it can be changed into another prime (16688517047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8344258508 + 8344258509.

It is an arithmetic number, because the mean of its divisors is an integer number (8344258509).

Almost surely, 2^16688517017 is an apocalyptic number.

It is an amenable number.

16688517017 is a deficient number, since it is larger than the sum of its proper divisors (1).

16688517017 is an equidigital number, since it uses as much as digits as its factorization.

16688517017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 564480, while the sum is 50.

The spelling of 16688517017 in words is "sixteen billion, six hundred eighty-eight million, five hundred seventeen thousand, seventeen".