16550072317 has 2 divisors, whose sum is σ = 16550072318. Its totient is φ = 16550072316.

The previous prime is 16550072299. The next prime is 16550072327. The reversal of 16550072317 is 71327005561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16177041721 + 373030596 = 127189^2 + 19314^2 .

It is a cyclic number.

It is not a de Polignac number, because 16550072317 - 2²³ = 16541683709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16550072327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8275036158 + 8275036159.

It is an arithmetic number, because the mean of its divisors is an integer number (8275036159).

Almost surely, 2^16550072317 is an apocalyptic number.

It is an amenable number.

16550072317 is a deficient number, since it is larger than the sum of its proper divisors (1).

16550072317 is an equidigital number, since it uses as much as digits as its factorization.

16550072317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 44100, while the sum is 37.

Adding to 16550072317 its reverse (71327005561), we get a palindrome (87877077878).

The spelling of 16550072317 in words is "sixteen billion, five hundred fifty million, seventy-two thousand, three hundred seventeen".