16317116305649 has 2 divisors, whose sum is σ = 16317116305650. Its totient is φ = 16317116305648.

The previous prime is 16317116305561. The next prime is 16317116305729. The reversal of 16317116305649 is 94650361171361.

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., 15577743328225 + 739372977424 = 3946865^2 + 859868^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16317116305649 is a prime.

It is a super-2 number, since 2×16317116305649² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16317116305649.

It is not a weakly prime, because it can be changed into another prime (16317116304649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8158558152824 + 8158558152825.

It is an arithmetic number, because the mean of its divisors is an integer number (8158558152825).

Almost surely, 2^{16317116305649} is an apocalyptic number.

It is an amenable number.

16317116305649 is a deficient number, since it is larger than the sum of its proper divisors (1).

16317116305649 is an equidigital number, since it uses as much as digits as its factorization.

16317116305649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2449440, while the sum is 53.

The spelling of 16317116305649 in words is "sixteen trillion, three hundred seventeen billion, one hundred sixteen million, three hundred five thousand, six hundred forty-nine".