A single number cannot define a sequence, even less a series.
A single number, such as 13151016161713181919, does not define a series.
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!
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.