16695634489 has 2 divisors, whose sum is σ = 16695634490. Its totient is φ = 16695634488.

The previous prime is 16695634481. The next prime is 16695634507. The reversal of 16695634489 is 98443659661.

16695634489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12164325264 + 4531309225 = 110292^2 + 67315^2 .

It is an emirp because it is prime and its reverse (98443659661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16695634489 - 2³ = 16695634481 is a prime.

It is a super-2 number, since 2×16695634489² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16695634481) 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, 8347817244 + 8347817245.

It is an arithmetic number, because the mean of its divisors is an integer number (8347817245).

Almost surely, 2^16695634489 is an apocalyptic number.

It is an amenable number.

16695634489 is a deficient number, since it is larger than the sum of its proper divisors (1).

16695634489 is an equidigital number, since it uses as much as digits as its factorization.

16695634489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 33592320, while the sum is 61.

The spelling of 16695634489 in words is "sixteen billion, six hundred ninety-five million, six hundred thirty-four thousand, four hundred eighty-nine".