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_13018116_1 ( played VARCHAR, pts_agst VARCHAR )

### Question ###
What is the number of played when points against 645?

### Accurate SQL ###

SELECT COUNT(played) FROM table_13018116_1 WHERE pts_agst = 645