16785683173697 has 2 divisors, whose sum is σ = 16785683173698. Its totient is φ = 16785683173696.

The previous prime is 16785683173663. The next prime is 16785683173783. The reversal of 16785683173697 is 79637138658761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16552887538576 + 232795635121 = 4068524^2 + 482489^2 .

It is a cyclic number.

It is not a de Polignac number, because 16785683173697 - 2²⁸ = 16785414738241 is a prime.

It is not a weakly prime, because it can be changed into another prime (16785683173997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8392841586848 + 8392841586849.

It is an arithmetic number, because the mean of its divisors is an integer number (8392841586849).

Almost surely, 2^{16785683173697} is an apocalyptic number.

It is an amenable number.

16785683173697 is a deficient number, since it is larger than the sum of its proper divisors (1).

16785683173697 is an equidigital number, since it uses as much as digits as its factorization.

16785683173697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1920360960, while the sum is 77.

The spelling of 16785683173697 in words is "sixteen trillion, seven hundred eighty-five billion, six hundred eighty-three million, one hundred seventy-three thousand, six hundred ninety-seven".