642213851248 has 10 divisors (see below), whose sum is σ = 1244289336824. Its totient is φ = 321106925616.

The previous prime is 642213851233. The next prime is 642213851263. The reversal of 642213851248 is 842158312246.

It is an interprime number because it is at equal distance from previous prime (642213851233) and next prime (642213851263).

It is a junction number, because it is equal to n+sod(n) for n = 642213851198 and 642213851207.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20069182836 + ... + 20069182867.

Almost surely, 2^642213851248 is an apocalyptic number.

It is an amenable number.

642213851248 is a deficient number, since it is larger than the sum of its proper divisors (602075485576).

642213851248 is a wasteful number, since it uses less digits than its factorization.

642213851248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40138365711 (or 40138365705 counting only the distinct ones).

The product of its digits is 737280, while the sum is 46.

The spelling of 642213851248 in words is "six hundred forty-two billion, two hundred thirteen million, eight hundred fifty-one thousand, two hundred forty-eight".