16506058817 has 2 divisors, whose sum is σ = 16506058818. Its totient is φ = 16506058816.

The previous prime is 16506058783. The next prime is 16506058843. The reversal of 16506058817 is 71885060561.

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., 14747430721 + 1758628096 = 121439^2 + 41936^2 .

It is a cyclic number.

It is not a de Polignac number, because 16506058817 - 2²⁰ = 16505010241 is a prime.

It is not a weakly prime, because it can be changed into another prime (16506058117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8253029408 + 8253029409.

It is an arithmetic number, because the mean of its divisors is an integer number (8253029409).

Almost surely, 2^16506058817 is an apocalyptic number.

It is an amenable number.

16506058817 is a deficient number, since it is larger than the sum of its proper divisors (1).

16506058817 is an equidigital number, since it uses as much as digits as its factorization.

16506058817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 403200, while the sum is 47.

The spelling of 16506058817 in words is "sixteen billion, five hundred six million, fifty-eight thousand, eight hundred seventeen".