स्वं स्वं कालं मनुर्भुङ्क्ते साधिकां ह्येकसप्ततिम् ॥ २४ ॥
svam svam kalam manur bhuṅkte
svam-own; svam-accordingly; kalam-duration of life; manuh-Manu; bhuṅkte-enjoys; sadhikam-a little more than; hi-certainly; eka-saptatim-seventy-one.
Each and every Manu enjoys a life of a little more than seventy-one sets of four millenniums.
The duration of life of a Manu comprises seventy-one sets of four millenniums, as described in the Visnu Purana. The duration of life of one Manu is about 852,000 years in the calculation of the demigods, or, in the calculation of human beings, 306,720,000 years.