641375656 has 16 divisors (see below), whose sum is σ = 1204596000. Its totient is φ = 320150064.

The previous prime is 641375633. The next prime is 641375689. The reversal of 641375656 is 656573146.

641375656 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 2×641375656² = 822725464218860672, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62130 + ... + 71713.

It is an arithmetic number, because the mean of its divisors is an integer number (75287250).

Almost surely, 2^641375656 is an apocalyptic number.

It is an amenable number.

641375656 is a deficient number, since it is larger than the sum of its proper divisors (563220344).

641375656 is a wasteful number, since it uses less digits than its factorization.

641375656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134448 (or 134444 counting only the distinct ones).

The product of its digits is 453600, while the sum is 43.

The square root of 641375656 is about 25325.3954756880. The cubic root of 641375656 is about 862.3908843549.

The spelling of 641375656 in words is "six hundred forty-one million, three hundred seventy-five thousand, six hundred fifty-six".