645606576 has 60 divisors (see below), whose sum is σ = 1808615640. Its totient is φ = 214986240.

The previous prime is 645606557. The next prime is 645606583. The reversal of 645606576 is 675606546.

645606576 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 11 ways as a sum of consecutive naturals, for example, 212911 + ... + 215921.

It is an arithmetic number, because the mean of its divisors is an integer number (30143594).

Almost surely, 2^645606576 is an apocalyptic number.

It is an amenable number.

645606576 is an abundant number, since it is smaller than the sum of its proper divisors (1163009064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

645606576 is a wasteful number, since it uses less digits than its factorization.

645606576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4514 (or 4505 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 45.

The square root of 645606576 is about 25408.7893454214. The cubic root of 645606576 is about 864.2830219918.

The spelling of 645606576 in words is "six hundred forty-five million, six hundred six thousand, five hundred seventy-six".