645466604 has 12 divisors (see below), whose sum is σ = 1153600224. Its totient is φ = 315866544.

The previous prime is 645466589. The next prime is 645466607. The reversal of 645466604 is 406664546.

645466604 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (645466607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1716479 + ... + 1716854.

It is an arithmetic number, because the mean of its divisors is an integer number (96133352).

Almost surely, 2^645466604 is an apocalyptic number.

It is an amenable number.

645466604 is a deficient number, since it is larger than the sum of its proper divisors (508133620).

645466604 is a wasteful number, since it uses less digits than its factorization.

645466604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3433384 (or 3433382 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 41.

The square root of 645466604 is about 25406.0347949065. The cubic root of 645466604 is about 864.2205566187.

The spelling of 645466604 in words is "six hundred forty-five million, four hundred sixty-six thousand, six hundred four".