How many millions of total viewers watched series #57?
CREATE TABLE table_12419515_4 (
    total_viewers__in_millions_ VARCHAR,
    series__number VARCHAR
)
SELECT COUNT(total_viewers__in_millions_) FROM table_12419515_4 WHERE series__number = 57
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: How many millions of total viewers watched series #57? ### Input: CREATE TABLE table_12419515_4 (
    total_viewers__in_millions_ VARCHAR,
    series__number VARCHAR
) ### Response: SELECT COUNT(total_viewers__in_millions_) FROM table_12419515_4 WHERE series__number = 57