16504520317 has 2 divisors, whose sum is σ = 16504520318. Its totient is φ = 16504520316.

The previous prime is 16504520299. The next prime is 16504520323. The reversal of 16504520317 is 71302540561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16075450521 + 429069796 = 126789^2 + 20714^2 .

It is a cyclic number.

It is not a de Polignac number, because 16504520317 - 2⁷ = 16504520189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16504520917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8252260158 + 8252260159.

It is an arithmetic number, because the mean of its divisors is an integer number (8252260159).

Almost surely, 2^16504520317 is an apocalyptic number.

It is an amenable number.

16504520317 is a deficient number, since it is larger than the sum of its proper divisors (1).

16504520317 is an equidigital number, since it uses as much as digits as its factorization.

16504520317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 34.

The spelling of 16504520317 in words is "sixteen billion, five hundred four million, five hundred twenty thousand, three hundred seventeen".