642883442244 has 12 divisors (see below), whose sum is σ = 1500061365264. Its totient is φ = 214294480744.

The previous prime is 642883442231. The next prime is 642883442351. The reversal of 642883442244 is 442244388246.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×642883442244² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26786810082 + ... + 26786810105.

It is an arithmetic number, because the mean of its divisors is an integer number (125005113772).

Almost surely, 2^642883442244 is an apocalyptic number.

It is an amenable number.

642883442244 is an abundant number, since it is smaller than the sum of its proper divisors (857177923020).

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

642883442244 is a wasteful number, since it uses less digits than its factorization.

642883442244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53573620194 (or 53573620192 counting only the distinct ones).

The product of its digits is 9437184, while the sum is 51.

The spelling of 642883442244 in words is "six hundred forty-two billion, eight hundred eighty-three million, four hundred forty-two thousand, two hundred forty-four".