641645068 has 48 divisors (see below), whose sum is σ = 1210809600. Its totient is φ = 296835840.

The previous prime is 641645057. The next prime is 641645077. The reversal of 641645068 is 860546146.

It is a happy number.

641645068 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 641645068.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 391146 + ... + 392782.

It is an arithmetic number, because the mean of its divisors is an integer number (25225200).

Almost surely, 2^641645068 is an apocalyptic number.

It is an amenable number.

641645068 is a deficient number, since it is larger than the sum of its proper divisors (569164532).

641645068 is a wasteful number, since it uses less digits than its factorization.

641645068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1810 (or 1808 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 641645068 is about 25330.7139259832. The cubic root of 641645068 is about 862.5116175149.

The spelling of 641645068 in words is "six hundred forty-one million, six hundred forty-five thousand, sixty-eight".