642441412422 has 80 divisors (see below), whose sum is σ = 1475335173312. Its totient is φ = 208827745920.

The previous prime is 642441412373. The next prime is 642441412427. The reversal of 642441412422 is 224214144246.

642441412422 is a `hidden beast` number, since 642 + 4 + 4 + 1 + 4 + 1 + 2 + 4 + 2 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642441412427) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 15169108 + ... + 15211400.

Almost surely, 2^642441412422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 642441412422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (737667586656).

642441412422 is an abundant number, since it is smaller than the sum of its proper divisors (832893760890).

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

642441412422 is a wasteful number, since it uses less digits than its factorization.

642441412422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44635 (or 44626 counting only the distinct ones).

The product of its digits is 98304, while the sum is 36.

Adding to 642441412422 its reverse (224214144246), we get a palindrome (866655556668).

The spelling of 642441412422 in words is "six hundred forty-two billion, four hundred forty-one million, four hundred twelve thousand, four hundred twenty-two".