const BigNumber = require("bignumber.js")
const bn1 = 3158916439872439867982374698723489762983746892734895
const bn2 = new BigNumber('3158916439872439867982374698723489762983746892734895')
console.log(bn1)
console.log(bn2.toString())
Created from: https://npm.runkit.com/bignumber.js