It's about 1,000 times as heavy as a Human Brain
In other words, 25,490,000 grains is 1,220 times the weight of a Human Brain, and the weight of a Human Brain is 0.00082 times that amount.(adult)
The average weight of an adult human brain is between 20,800 grains. In humans and primates, sight and vision utilize about 30 different parts of the brain which together account for about half of the brain's size.
It's about 1,500 times as heavy as a liter of Water
In other words, 25,490,000 grains is 1,651.6780 times the weight of a liter of Water, and the weight of a liter of Water is 0.0006054449 times that amount.(fresh; 4° C / 39.2° F; maximum density)
Contrary to popular belief, 1 liter (0.0.264172052358148 gal) of water at 4° C / 39.2° F (its point of maximum density) weighs 15,432.790 grains rather than 1 kg exactly. The total volume of water on the planet Earth is about 13,590,000,000,000,000,000 (13.59 quntillion) L (3,590,000,000,000,000,000 gallons).
It's about 2,500 times as heavy as a Basketball
In other words, 25,490,000 grains is 2,648.31168830 times the weight of a Basketball, and the weight of a Basketball is 0.00037759905846 times that amount.(NBA official ball standards, Size 7)
A regulation NBA basketball, manufactured by Spalding, is known as a Size 7 ball and weighs 9,625 grains. These balls have 4,118 pebbles each with a diameter of 2.5 mm
It's about 4,000 times as heavy as a Football (Soccer)
In other words, 25,490,000 grains is 3,800 times the weight of a Football (Soccer), and the weight of a Football (Soccer) is 0.00026 times that amount.(a.k.a. Soccer, a.k.a. Association Football) (FIFA Law 2 specification)
According to FIFA's Law of the Game number 2, a football must weigh between 6,300 grains and 6,900 grains. An artifact on display at the Smith Art Gallery in Museum in Stirling, Scotland is said to be the world's oldest football and is about one-third to one-half the size of a modern football.
It's about 4,000 times as heavy as a Football (American)
In other words, 25,490,000 grains is 4,018.1280788180 times the weight of a Football (American), and the weight of a Football (American) is 0.0002488721067085 times that amount.(a.k.a. "pigskin") (NFL standard)
Per National Football League official rules, an American football must weigh between 6,125 grains and 6,562.50 grains. Because of NFL regulations, ceremonial considerations, and backup requirements, each NFL Superbowl requires the manufacture of 144 balls exclusively for the event.
It's about 4,500 times as heavy as a Can of Soup
In other words, the weight of a Can of Soup is 0.00021 times 25,490,000 grains.(for Campbell''s Condensed Tomato Soup, 317.9 ml)
A can of Campbell''s Tomato Soup weighs 5,400 grains. Cans have been used to store soup and other foods since their invention in 1913, but a dedicated can opener was not developed until cans began to use thinner materials — prior to that time, cans were usually opened using various blunt instruments and tools.