445664313 has 6 divisors (see below), whose sum is σ = 643737354. Its totient is φ = 297109536.

The previous prime is 445664291. The next prime is 445664327. The reversal of 445664313 is 313466544.

445664313 is a `hidden beast` number, since 4 + 4 + 5 + 6 + 643 + 1 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 292820544 + 152843769 = 17112^2 + 12363^2 .

It is not a de Polignac number, because 445664313 - 2⁶ = 445664249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (445664393) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24759120 + ... + 24759137.

It is an arithmetic number, because the mean of its divisors is an integer number (107289559).

Almost surely, 2^445664313 is an apocalyptic number.

It is an amenable number.

445664313 is a deficient number, since it is larger than the sum of its proper divisors (198073041).

445664313 is a wasteful number, since it uses less digits than its factorization.

445664313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49518263 (or 49518260 counting only the distinct ones).

The product of its digits is 103680, while the sum is 36.

The square root of 445664313 is about 21110.7629658428. The cubic root of 445664313 is about 763.8403910114.

The spelling of 445664313 in words is "four hundred forty-five million, six hundred sixty-four thousand, three hundred thirteen".