641585956 has 24 divisors (see below), whose sum is σ = 1227564576. Its totient is φ = 290982720.

The previous prime is 641585953. The next prime is 641585963. The reversal of 641585956 is 659585146.

641585956 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (641585953) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4155 + ... + 36061.

It is an arithmetic number, because the mean of its divisors is an integer number (51148524).

Almost surely, 2^641585956 is an apocalyptic number.

It is an amenable number.

641585956 is a deficient number, since it is larger than the sum of its proper divisors (585978620).

641585956 is a wasteful number, since it uses less digits than its factorization.

641585956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32379 (or 32377 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 49.

The square root of 641585956 is about 25329.5470942534. The cubic root of 641585956 is about 862.4851302064.

The spelling of 641585956 in words is "six hundred forty-one million, five hundred eighty-five thousand, nine hundred fifty-six".