Big number in C++

Question

I am trying to place a big number in a C++ variable. The number is 600851475143

I tried unsigned long long int but got an error saying it the constant was too big.

Answer 1

You can specify an integer literal as long by the suffix L.
You can specify an integer literal as long long by the suffix LL.

#include 

int main()
{
    long long num = 600851475143LL;

    std::cout << num;
}