A culture of bacteria has an initial population of 6100 bacteria and doubles every 5 hours. Using the formula P_{t} = P_{0} * 2 ^ (6/2) where P_{t} is the population after t hours, P_{0} is the initial population, t is the time in hours and d is the doubling time, what is the population of bacteria in the culture after 12 hours, to the nearest whole number?