642650333321 has 8 divisors (see below), whose sum is σ = 648787636224. Its totient is φ = 636541912480.

The previous prime is 642650333219. The next prime is 642650333323. The reversal of 642650333321 is 123333056246.

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 642650333321 - 2¹⁰ = 642650332297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642650333323) 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, 7175801 + ... + 7264806.

It is an arithmetic number, because the mean of its divisors is an integer number (81098454528).

Almost surely, 2^642650333321 is an apocalyptic number.

It is an amenable number.

642650333321 is a deficient number, since it is larger than the sum of its proper divisors (6137302903).

642650333321 is a wasteful number, since it uses less digits than its factorization.

642650333321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14441031.

The product of its (nonzero) digits is 233280, while the sum is 38.

Adding to 642650333321 its reverse (123333056246), we get a palindrome (765983389567).

The spelling of 642650333321 in words is "six hundred forty-two billion, six hundred fifty million, three hundred thirty-three thousand, three hundred twenty-one".