The Prime Minister of India is the head of the government and holds extensive power, duties, and responsibilities. As per the Constitution of India, some of the specific roles and duties of the Prime Minister are:

• Appointing and dismissing various officials including judges, ministers, and ambassadors.
• Presiding over the Cabinet meetings and taking important decisions regarding the administration.
• Communicating with the President regarding key decisions and matters of the government.
• Representing India on international platforms and conducting diplomatic relations with other countries.
• Preparing and enforcing domestic policies for the economic and social development of the country.

The Prime Minister's roles and duties differ from other ministers in that he or she has more power and authority. Additionally, as the head of government, the Prime Minister plays a crucial role in the functioning of the Indian political system.