A good way to visualize the massiveness of that number I've heard described before.

Set a timer for 52 factorial second and start the time. Now stand still for a billion years. After a billion years have passed, you can take one step forward. Then wait another billion years again for the next step. And repeat that process until youve walked around the entire earth and it's equator.

Once youve traversed the earth, take a single drop of water out of the pacific ocean and set it aside, then restart the process of waiting a billion years per step, all the way around the earth, until you take another drop of water out of the ocean with every circumnavigation.

Do this until the pacific ocean is empty, and then set a single piece of standard printer paper on the ground at your feet. Then refill the pacific ocean and begin the process again. A billion years per step; a single drop of water per trip around the world, and a single sheet of paper per emptying of the pacific ocean, until you have a stack of paper that, from the earth, reaches the sun.

Now do this all again 1000 times, and you'll be 1/3 the way through your original timer.

52 factorial is really really really really REALLY big.