It's about four-fifths as heavy as a Hippopotamus.
In other words, 49,000,000 grains is 0.8470 times the weight of a Hippopotamus, and the weight of a Hippopotamus is 1.180 times that amount.(Hippopotamus amphibius) (adult, male)
The average weight of an adult male hippopotamus ranges from 57,900,000 grains. Appearances to the contrary, adult hippos cannot swim or float in water; they actually move by leaping and walking across lake bottoms at about 8 kph (5 mph).
It's about one-and-one-fifth times as heavy as The Tongue of a Blue Whale.
In other words, the weight of The Tongue of a Blue Whale is 0.830 times 49,000,000 grains.(Balaenoptera musculus) (adult)
The tongue of a Blue Whale can weigh up to 42,000,000 grains. Despite their tremendous size, blue whales feed almost exclusively on tiny crustaceans called krill and cannot swallow anything much larger than a beach ball.
It's about one-and-three-tenths times as heavy as a Giraffe.
It's about one-and-a-half times as heavy as a Rhinoceros.
In other words, the weight of a Rhinoceros is 0.670 times 49,000,000 grains.(for Black rhinoceros, Diceros bicornis) (Adult, male)
An adult black rhinoceros weighs between 32,000,000 grains. Rhinoceros are extremely aggressive — nearly one of every two males will die as a result of fighting with other rhinoceros.
It's about one-and-nine-tenths times as heavy as a Car.
In other words, 49,000,000 grains is 1.9220 times the weight of a Car, and the weight of a Car is 0.52030 times that amount.(for 2009 Ford Taurus; automatic transmission; curb weight)
A 2009 Ford Taurus weighs 25,490,000 grains. The first mass-produced car, the Curved Dash Oldsmobile — introduced in 1901 — weighed just 5,957,000 grains.
It's about half as heavy as an Elephant.
In other words, 49,000,000 grains is 0.520 times the weight of an Elephant, and the weight of an Elephant is 1.90 times that amount.(for African bush elephant, Loxodonta africana) (Adult, bull)
A bull African bush elephant weighs about 94,000,000 grains. Among African elephants, both males and females have tusks (whereas female Asian elephants, Elephas maximus, do not have tusks) which can grow to 3 m (10 ft) and typically weigh about 62,000,000 grains
It's about half as heavy as a Tyrannosaurus rex.
In other words, the weight of a Tyrannosaurus rex is 2 times 49,000,000 grains.(for FMNH PR2081, a.k.a. "Sue") (a.k.a. Tyrannosaurus, a.k.a. T-Rex) (estimated live weight)
The notable Tyrannosaurus specimen housed at the Field Museum of Natural History in Chicago, Illinois, "Sue," is estimated to have weighed about 99,000,000 grains while alive. A renowned predator in popular culture, the teeth of tyrannosaurus rex were up to 33.02 cm (13 in) long.