How many nuclear bombs does Russia have versus the US?

Thw U.S. has roughly 9000 missiles, while Russia has roughly 1. However there is an undisclosed number of warheads. Asuming that multi warhead missiles are in the majority then there are at least 9 warheads for every missile. Making around 81000 bombs with a minimum 5 megaton capacity. In terms of missiles that would succesfully hit their targets there are enough nukes and a limited amount of air defense systems that mutual destruction would be assured even in a preemtive strike situation. Efforts to reduce nuclear capacity are thwarted by 3rd party countries with no "constraints" on launching a strike at other countries. In any event nuclear capacity will stagnate and remain until the time comes to use them.