445664564 has 6 divisors (see below), whose sum is σ = 779912994. Its totient is φ = 222832280.

The previous prime is 445664561. The next prime is 445664567. The reversal of 445664564 is 465466544.

It is an interprime number because it is at equal distance from previous prime (445664561) and next prime (445664567).

It can be written as a sum of positive squares in only one way, i.e., 444872464 + 792100 = 21092^2 + 890^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445664561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55708067 + ... + 55708074.

It is an arithmetic number, because the mean of its divisors is an integer number (129985499).

Almost surely, 2^445664564 is an apocalyptic number.

It is an amenable number.

445664564 is a deficient number, since it is larger than the sum of its proper divisors (334248430).

445664564 is a wasteful number, since it uses less digits than its factorization.

445664564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111416145 (or 111416143 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 44.

The square root of 445664564 is about 21110.7689106768. The cubic root of 445664564 is about 763.8405344107.

The spelling of 445664564 in words is "four hundred forty-five million, six hundred sixty-four thousand, five hundred sixty-four".