642238485833 has 8 divisors (see below), whose sum is σ = 751888959360. Its totient is φ = 537063541920.

The previous prime is 642238485829. The next prime is 642238485839. The reversal of 642238485833 is 338584832246.

It is a happy number.

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 642238485833 - 2² = 642238485829 is a prime.

It is not an unprimeable number, because it can be changed into a prime (642238485839) 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, 1118882093 + ... + 1118882666.

It is an arithmetic number, because the mean of its divisors is an integer number (93986119920).

Almost surely, 2^642238485833 is an apocalyptic number.

It is an amenable number.

642238485833 is a deficient number, since it is larger than the sum of its proper divisors (109650473527).

642238485833 is a wasteful number, since it uses less digits than its factorization.

642238485833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2237764807.

The product of its digits is 26542080, while the sum is 56.

The spelling of 642238485833 in words is "six hundred forty-two billion, two hundred thirty-eight million, four hundred eighty-five thousand, eight hundred thirty-three".