445547664 has 45 divisors (see below), whose sum is σ = 1247623923. Its totient is φ = 148431456.

The previous prime is 445547633. The next prime is 445547671. The reversal of 445547664 is 466745544.

The square root of 445547664 is 21108.

It is a perfect power (a square), and thus also a powerful number.

445547664 is a `hidden beast` number, since 4 + 45 + 547 + 6 + 64 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 252417 + ... + 254175.

Almost surely, 2^445547664 is an apocalyptic number.

445547664 is the 21108-th square number.

It is an amenable number.

445547664 is an abundant number, since it is smaller than the sum of its proper divisors (802076259).

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

445547664 is an equidigital number, since it uses as much as digits as its factorization.

445547664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3532 (or 1764 counting only the distinct ones).

The product of its digits is 1612800, while the sum is 45.

The cubic root of 445547664 is about 763.7737421981.

The spelling of 445547664 in words is "four hundred forty-five million, five hundred forty-seven thousand, six hundred sixty-four".