641822433720 has 192 divisors, whose sum is σ = 2124316147680. Its totient is φ = 155005913088.

The previous prime is 641822433697. The next prime is 641822433779. The reversal of 641822433720 is 27334228146.

641822433720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 776274 + ... + 1373406.

Almost surely, 2^641822433720 is an apocalyptic number.

641822433720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 641822433720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1062158073840).

641822433720 is an abundant number, since it is smaller than the sum of its proper divisors (1482493713960).

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

641822433720 is a wasteful number, since it uses less digits than its factorization.

641822433720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597226 (or 597209 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 42.

The spelling of 641822433720 in words is "six hundred forty-one billion, eight hundred twenty-two million, four hundred thirty-three thousand, seven hundred twenty".