10
57
One number does not make a sequence (nor a series).
11 comes next.
The number 7 comes next.
There is no series of number: just one very large number!
10
mcmlx
It is: 4554
The next number is the sequence 236175969, 48, 12 is 236175861.
The series seems to be "add 3," so the next number in the series would be 12 followed by 15.
18