642255351748 has 24 divisors (see below), whose sum is σ = 1148641449984. Its totient is φ = 314081376000.

The previous prime is 642255351739. The next prime is 642255351823. The reversal of 642255351748 is 847153552246.

It is a junction number, because it is equal to n+sod(n) for n = 642255351695 and 642255351704.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 884653 + ... + 1437748.

It is an arithmetic number, because the mean of its divisors is an integer number (47860060416).

Almost surely, 2^642255351748 is an apocalyptic number.

It is an amenable number.

642255351748 is a deficient number, since it is larger than the sum of its proper divisors (506386098236).

642255351748 is a wasteful number, since it uses less digits than its factorization.

642255351748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2323923 (or 2323921 counting only the distinct ones).

The product of its digits is 8064000, while the sum is 52.

The spelling of 642255351748 in words is "six hundred forty-two billion, two hundred fifty-five million, three hundred fifty-one thousand, seven hundred forty-eight".