16969385617 has 2 divisors, whose sum is σ = 16969385618. Its totient is φ = 16969385616.

The previous prime is 16969385603. The next prime is 16969385639. The reversal of 16969385617 is 71658396961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16444471696 + 524913921 = 128236^2 + 22911^2 .

It is an emirp because it is prime and its reverse (71658396961) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16969385617 is a prime.

It is not a weakly prime, because it can be changed into another prime (16969385687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8484692808 + 8484692809.

It is an arithmetic number, because the mean of its divisors is an integer number (8484692809).

Almost surely, 2^16969385617 is an apocalyptic number.

It is an amenable number.

16969385617 is a deficient number, since it is larger than the sum of its proper divisors (1).

16969385617 is an equidigital number, since it uses as much as digits as its factorization.

16969385617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14696640, while the sum is 61.

The spelling of 16969385617 in words is "sixteen billion, nine hundred sixty-nine million, three hundred eighty-five thousand, six hundred seventeen".