642502242889 has 8 divisors (see below), whose sum is σ = 706647312000. Its totient is φ = 580460290896.

The previous prime is 642502242869. The next prime is 642502242929. The reversal of 642502242889 is 988242205246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 642502242889 - 2⁹ = 642502242377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642502242869) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 525778639 + ... + 525779860.

It is an arithmetic number, because the mean of its divisors is an integer number (88330914000).

Almost surely, 2^642502242889 is an apocalyptic number.

It is an amenable number.

642502242889 is a deficient number, since it is larger than the sum of its proper divisors (64145069111).

642502242889 is a wasteful number, since it uses less digits than its factorization.

642502242889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051558559.

The product of its (nonzero) digits is 4423680, while the sum is 52.

The spelling of 642502242889 in words is "six hundred forty-two billion, five hundred two million, two hundred forty-two thousand, eight hundred eighty-nine".