641380824 has 96 divisors (see below), whose sum is σ = 2049315840. Its totient is φ = 177336000.

The previous prime is 641380813. The next prime is 641380837. The reversal of 641380824 is 428083146.

641380824 is a `hidden beast` number, since 641 + 3 + 8 + 0 + 8 + 2 + 4 = 666.

641380824 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×641380824² = 822738722789837952, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4902 + ... + 36149.

It is an arithmetic number, because the mean of its divisors is an integer number (21347040).

Almost surely, 2^641380824 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 641380824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1024657920).

641380824 is an abundant number, since it is smaller than the sum of its proper divisors (1407935016).

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

641380824 is a wasteful number, since it uses less digits than its factorization.

641380824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41101 (or 41094 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 641380824 is about 25325.4975074528. The cubic root of 641380824 is about 862.3932006387.

The spelling of 641380824 in words is "six hundred forty-one million, three hundred eighty thousand, eight hundred twenty-four".