6*13= 78
78+13=91
91*13= 1183
1183+13=1196
6-78-91-1183-1196
so 1196
59 is the next number in this series.
The next number in the series is 67.
A single number such as 61205041320 does not make a series.
A single number, such as 12848384 does not make a series.
One number does not make a sequence (nor a series).
There is no series of number: just one very large number!
73791170
20
8
243
25
108