645463305 has 12 divisors (see below), whose sum is σ = 1118803140. Its totient is φ = 344247072.

The previous prime is 645463277. The next prime is 645463339. The reversal of 645463305 is 503364546.

645463305 is a `hidden beast` number, since 645 + 4 + 6 + 3 + 3 + 0 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 287913024 + 357550281 = 16968^2 + 18909^2 .

It is not a de Polignac number, because 645463305 - 2¹⁵ = 645430537 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 645463305.

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, 7171770 + ... + 7171859.

It is an arithmetic number, because the mean of its divisors is an integer number (93233595).

Almost surely, 2^645463305 is an apocalyptic number.

It is an amenable number.

645463305 is a deficient number, since it is larger than the sum of its proper divisors (473339835).

645463305 is a wasteful number, since it uses less digits than its factorization.

645463305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14343640 (or 14343637 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 36.

The square root of 645463305 is about 25405.9698693043. The cubic root of 645463305 is about 864.2190842634.

The spelling of 645463305 in words is "six hundred forty-five million, four hundred sixty-three thousand, three hundred five".