645303075 has 24 divisors (see below), whose sum is σ = 1067640000. Its totient is φ = 343923360.

The previous prime is 645303067. The next prime is 645303077. The reversal of 645303075 is 570303546.

645303075 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 645303075 - 2³ = 645303067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (645303077) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 182676 + ... + 186174.

It is an arithmetic number, because the mean of its divisors is an integer number (44485000).

Almost surely, 2^645303075 is an apocalyptic number.

645303075 is a deficient number, since it is larger than the sum of its proper divisors (422336925).

645303075 is a wasteful number, since it uses less digits than its factorization.

645303075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5971 (or 5966 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 33.

The square root of 645303075 is about 25402.8162808772. The cubic root of 645303075 is about 864.1475670123.

The spelling of 645303075 in words is "six hundred forty-five million, three hundred three thousand, seventy-five".