642441013622 has 8 divisors (see below), whose sum is σ = 964778164416. Its totient is φ = 320848292152.

The previous prime is 642441013619. The next prime is 642441013633. The reversal of 642441013622 is 226310144246.

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 (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186105173 + ... + 186108624.

It is an arithmetic number, because the mean of its divisors is an integer number (120597270552).

Almost surely, 2^642441013622 is an apocalyptic number.

642441013622 is a deficient number, since it is larger than the sum of its proper divisors (322337150794).

642441013622 is a wasteful number, since it uses less digits than its factorization.

642441013622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372214662.

The product of its (nonzero) digits is 55296, while the sum is 35.

Adding to 642441013622 its reverse (226310144246), we get a palindrome (868751157868).

The spelling of 642441013622 in words is "six hundred forty-two billion, four hundred forty-one million, thirteen thousand, six hundred twenty-two".