642043111822 has 8 divisors (see below), whose sum is σ = 1100645334576. Its totient is φ = 275161333632.

The previous prime is 642043111811. The next prime is 642043111847. The reversal of 642043111822 is 228111340246.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22930111123 + ... + 22930111150.

It is an arithmetic number, because the mean of its divisors is an integer number (137580666822).

Almost surely, 2^642043111822 is an apocalyptic number.

642043111822 is a deficient number, since it is larger than the sum of its proper divisors (458602222754).

642043111822 is a wasteful number, since it uses less digits than its factorization.

642043111822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45860222282.

The product of its (nonzero) digits is 18432, while the sum is 34.

The spelling of 642043111822 in words is "six hundred forty-two billion, forty-three million, one hundred eleven thousand, eight hundred twenty-two".