Comment by musicale

Not sure what "struggle" or "too many" is supposed to mean, but my laptop (running Python in a Linux VM) handles million-digit numbers just fine

    >>> a=10**(1000000)
    >>> b=a//3
    >>> len(str(b))
    1000000

Given that computers have calculated the value of Pi to more than 60 million digits , I think we can safely say that computers readily handle numbers with many digits.