You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
Yuan_dynasty

Context:
After the death of Tugh Temür in 1332 and subsequent death of Rinchinbal (Emperor Ningzong) the same year, the 13-year-old Toghun Temür (Emperor Huizong), the last of the nine successors of Kublai Khan, was summoned back from Guangxi and succeeded to the throne. After El Temür's death, Bayan became as powerful an official as El Temür had been in the beginning of his long reign. As Toghun Temür grew, he came to disapprove of Bayan's autocratic rule. In 1340 he allied himself with Bayan's nephew Toqto'a, who was in discord with Bayan, and banished Bayan by coup. With the dismissal of Bayan, Toghtogha seized the power of the court. His first administration clearly exhibited fresh new spirit. He also gave a few early signs of a new and positive direction in central government. One of his successful projects was to finish the long-stalled official histories of the Liao, Jin, and Song dynasties, which were eventually completed in 1345. Yet, Toghtogha resigned his office with the approval of Toghun Temür, marking the end of his first administration, and he was not called back until 1349.

Question:
How many successors of Kublai was Toghun the last of?

nine