[SalesForce] How many batches can I run in 1 schedulable class

I have 5 batch classes (implements Database.Batchable). I was able to add all of them in a single schedulable class (implement Schedulable) and schedule it successfully (code below). It worked.

My questions:

• how many such batch classes can I keep adding to the below schedulable class without errors?
• Are there any limitations?
• What issues would I face?

Thoughts please

global class Schedulable_Notifications_ALL implements Schedulable 
{
    global void execute(SchedulableContext sc)
    {
        Batch_Notifications_1 batch1 = new Batch_Notifications_1();
        Batch_Notifications_2 batch2 = new Batch_Notifications_2();
        Batch_Notifications_3 batch3 = new Batch_Notifications_3();
        Batch_Notifications_4 batch4 = new Batch_Notifications_4();
        Batch_Notifications_5 batch5 = new Batch_Notifications_5();

        Database.executeBatch(batch1,10);
        Database.executeBatch(batch2,10);
        Database.executeBatch(batch3,10);
        Database.executeBatch(batch4,10);
        Database.executeBatch(batch5,10);

    }
}