No, it's not nearly enough. The exact number of weapons onboard is largely irrelevant. At any given time only about one third of a nation's attack submarines can be out on active patrol while the others are in transit, undergoing maintenance, or working up. During a crisis they can maybe surge two thirds of the force for a few months but that isn't sustainable. Each submarine can only be in one place at a time and they're likely to take some losses against a competent adversary.