Big Average

Consider the following list of $15$ large numbers:

$4250081908400271013963777662$

$5250081908400271013963777668$

$5250081908400271013963777662$

$5250081908400271013963777667$

$5250081908400271013963777661$

$5250081908400271013963777666$

$6250081908400271013963777663$

$6250081908400271013963777663$

$6250081908400271013963777668$

$6250081908400271013963777669$

$6250081908400271013963777652$

Please compute the average of these numbers

You need to provide your answer as just a single number. To solve this question, you can use any tool, or website, or google, or any software package, or any programming language, or tool. However, you're not allowed to discuss this with any other person, or ask for advice.