642340122633 has 24 divisors (see below), whose sum is σ = 1012202848800. Its totient is φ = 389285300160.

The previous prime is 642340122577. The next prime is 642340122659. The reversal of 642340122633 is 336221043246.

642340122633 is a `hidden beast` number, since 6 + 4 + 2 + 3 + 4 + 0 + 12 + 2 + 633 = 666.

It is not a de Polignac number, because 642340122633 - 2¹³ = 642340114441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (642345122633) 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 23 ways as a sum of consecutive naturals, for example, 4109293 + ... + 4262741.

It is an arithmetic number, because the mean of its divisors is an integer number (42175118700).

Almost surely, 2^642340122633 is an apocalyptic number.

It is an amenable number.

642340122633 is a deficient number, since it is larger than the sum of its proper divisors (369862726167).

642340122633 is a wasteful number, since it uses less digits than its factorization.

642340122633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195749 (or 195746 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 36.

Adding to 642340122633 its reverse (336221043246), we get a palindrome (978561165879).

The spelling of 642340122633 in words is "six hundred forty-two billion, three hundred forty million, one hundred twenty-two thousand, six hundred thirty-three".