1.firstly is mother and father that is any parent of father alive?
if not then your father and other brother can apply for the mutation of house in there name they can file an application of mutation with the death certificate and the family rasan card and affidavit. The property shall be mutated in there name,
2. Not required at most legal heir certificate can be asked the Tehsildar/taluka officer gives a legal heir certificate.
3. After the property is mutated in there name then an registered partition deed can be made on stamp paper and the property can be divided equally and deed can be registered with the subregistrar,
4. Since one house separate holding number shall be not issued the property shall have same holding number only it will jointly owned by 4 brothers.