645305926 has 16 divisors (see below), whose sum is σ = 974125440. Its totient is φ = 320604160.

The previous prime is 645305909. The next prime is 645305959. The reversal of 645305926 is 629503546.

645305926 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244896 + ... + 247516.

It is an arithmetic number, because the mean of its divisors is an integer number (60882840).

Almost surely, 2^645305926 is an apocalyptic number.

645305926 is a deficient number, since it is larger than the sum of its proper divisors (328819514).

645305926 is a wasteful number, since it uses less digits than its factorization.

645305926 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3359.

The product of its (nonzero) digits is 194400, while the sum is 40.

The square root of 645305926 is about 25402.8723966405. The cubic root of 645305926 is about 864.1488396346.

The spelling of 645305926 in words is "six hundred forty-five million, three hundred five thousand, nine hundred twenty-six".