641043568 has 40 divisors (see below), whose sum is σ = 1357234560. Its totient is φ = 290888640.

The previous prime is 641043563. The next prime is 641043577. The reversal of 641043568 is 865340146.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641043563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113221 + ... + 118747.

It is an arithmetic number, because the mean of its divisors is an integer number (33930864).

Almost surely, 2^641043568 is an apocalyptic number.

It is an amenable number.

641043568 is an abundant number, since it is smaller than the sum of its proper divisors (716190992).

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

641043568 is a wasteful number, since it uses less digits than its factorization.

641043568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6205 (or 6199 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 641043568 is about 25318.8382039935. The cubic root of 641043568 is about 862.2420173043.

The spelling of 641043568 in words is "six hundred forty-one million, forty-three thousand, five hundred sixty-eight".