641045560 has 64 divisors (see below), whose sum is σ = 1532649600. Its totient is φ = 240621696.

The previous prime is 641045557. The next prime is 641045611. The reversal of 641045560 is 65540146.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 77379 + ... + 85261.

It is an arithmetic number, because the mean of its divisors is an integer number (23947650).

Almost surely, 2^641045560 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 641045560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (766324800).

641045560 is an abundant number, since it is smaller than the sum of its proper divisors (891604040).

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

641045560 is a wasteful number, since it uses less digits than its factorization.

641045560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8020 (or 8016 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 641045560 is about 25318.8775422608. The cubic root of 641045560 is about 862.2429104232.

The spelling of 641045560 in words is "six hundred forty-one million, forty-five thousand, five hundred sixty".