library(bignum)
biginteger(1:3)
#> <biginteger[3]>
#> [1] 1 2 3
biginteger(4294967296)
#> <biginteger[1]>
#> [1] 4294967296
biginteger("-18446744073709551616")
#> <biginteger[1]>
#> [1] -1.844674e+19
options(bignum.max_dec_width = Inf)
biginteger("-18446744073709551616")
#> <biginteger[1]>
#> [1] -18446744073709551616
NA_biginteger_
#> <biginteger[1]>
#> [1] <NA>
Created on 2021-06-13 by the reprex package (v2.0.0)