645347852 has 12 divisors (see below), whose sum is σ = 1129537080. Its totient is φ = 322622976.

The previous prime is 645347849. The next prime is 645347861. The reversal of 645347852 is 258743546.

645347852 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 40268 + ... + 53964.

It is an arithmetic number, because the mean of its divisors is an integer number (94128090).

Almost surely, 2^645347852 is an apocalyptic number.

It is an amenable number.

645347852 is a deficient number, since it is larger than the sum of its proper divisors (484189228).

645347852 is a wasteful number, since it uses less digits than its factorization.

645347852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25480 (or 25478 counting only the distinct ones).

The product of its digits is 806400, while the sum is 44.

The square root of 645347852 is about 25403.6976048763. The cubic root of 645347852 is about 864.1675540242.

The spelling of 645347852 in words is "six hundred forty-five million, three hundred forty-seven thousand, eight hundred fifty-two".