17516916649 has 2 divisors, whose sum is σ = 17516916650. Its totient is φ = 17516916648.

The previous prime is 17516916643. The next prime is 17516916653. The reversal of 17516916649 is 94661961571.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11175661225 + 6341255424 = 105715^2 + 79632^2 .

It is a cyclic number.

It is not a de Polignac number, because 17516916649 - 2²³ = 17508528041 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 17516916649.

It is not a weakly prime, because it can be changed into another prime (17516916643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8758458324 + 8758458325.

It is an arithmetic number, because the mean of its divisors is an integer number (8758458325).

Almost surely, 2^17516916649 is an apocalyptic number.

It is an amenable number.

17516916649 is a deficient number, since it is larger than the sum of its proper divisors (1).

17516916649 is an equidigital number, since it uses as much as digits as its factorization.

17516916649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2449440, while the sum is 55.

The spelling of 17516916649 in words is "seventeen billion, five hundred sixteen million, nine hundred sixteen thousand, six hundred forty-nine".