The 73-year-old, who looked dapper in a black suit, was in Vigyan Bhavan here on Tuesday to receive the award instituted by the government of India for his portrayal a Bengali father in 'Piku'.
While addressing a gathering at the award ceremony, Mukherjee called Amitabh a "living legend". The cine icon took to Twitter on Wednesday morning where he shared that he is "truly touched" by the mention.
"Back now 3:54 am from Delhi and National Award! So humbled and touched, for President of India to take my name in his speech!" Amitabh tweeted.
"Truly touched, deeply humbled and honoured by the President's mention of me in his speech..." he wrote.
Big B was accompanied with his wife Jaya, son Abhishek, daughter Shweta Nanda and daughter-in-law Aishwarya Rai Bachchan for the award event.
This is not the first time that the 'Wazir' star has been conferred with a National Award. Amitabh won the prestigious award thrice for films like 'Agneepath', 'Black' and 'Paa'.