642544357008 has 20 divisors (see below), whose sum is σ = 1659906255728. Its totient is φ = 214181452320.

The previous prime is 642544356983. The next prime is 642544357019. The reversal of 642544357008 is 800753445246.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 13386340771 = 642544357008 / (6 + 4 + 2 + 5 + 4 + 4 + 3 + 5 + 7 + 0 + 0 + 8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6693170338 + ... + 6693170433.

Almost surely, 2^642544357008 is an apocalyptic number.

It is an amenable number.

642544357008 is an abundant number, since it is smaller than the sum of its proper divisors (1017361898720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

642544357008 is a wasteful number, since it uses less digits than its factorization.

642544357008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13386340782 (or 13386340776 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 48.

The spelling of 642544357008 in words is "six hundred forty-two billion, five hundred forty-four million, three hundred fifty-seven thousand, eight".