Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_12419515_4 (total_viewers__in_millions_ VARCHAR, series__number VARCHAR)

### Question ###
How many millions of total viewers watched series #57?

### Accurate SQL ###

SELECT COUNT(total_viewers__in_millions_) FROM table_12419515_4 WHERE series__number = 57