User blog comment:Primussupremus/supermans number./@comment-3427444-20170227033916

Here's my interpretation of the above:


 * 1) Start with 5.
 * 2) Take it to the power of 625 to get 5^625.
 * 3) Take the result to the power of 5^625. Repeat this step 5^625 times.
 * 4) Superman's number is (x!!)!!, where !! is double factorial and x is the result of the previous steps.

If my interpretation is correct, then your number is (((5^625)^(5^625)^(5^625))!!)!!, which is about 10^10^10^10^10^439.