16985646193 has 2 divisors, whose sum is σ = 16985646194. Its totient is φ = 16985646192.

The previous prime is 16985646187. The next prime is 16985646221. The reversal of 16985646193 is 39164658961.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12628590129 + 4357056064 = 112377^2 + 66008^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16985646193 is a prime.

It is not a weakly prime, because it can be changed into another prime (16985646103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8492823096 + 8492823097.

It is an arithmetic number, because the mean of its divisors is an integer number (8492823097).

Almost surely, 2^16985646193 is an apocalyptic number.

It is an amenable number.

16985646193 is a deficient number, since it is larger than the sum of its proper divisors (1).

16985646193 is an equidigital number, since it uses as much as digits as its factorization.

16985646193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8398080, while the sum is 58.

The spelling of 16985646193 in words is "sixteen billion, nine hundred eighty-five million, six hundred forty-six thousand, one hundred ninety-three".