445559664 has 80 divisors (see below), whose sum is σ = 1329557760. Its totient is φ = 127073280.

The previous prime is 445559659. The next prime is 445559701. The reversal of 445559664 is 466955544.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15844 + ... + 33795.

It is an arithmetic number, because the mean of its divisors is an integer number (16619472).

Almost surely, 2^445559664 is an apocalyptic number.

445559664 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

445559664 is an abundant number, since it is smaller than the sum of its proper divisors (883998096).

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

445559664 is a wasteful number, since it uses less digits than its factorization.

445559664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49678 (or 49672 counting only the distinct ones).

The product of its digits is 2592000, while the sum is 48.

The square root of 445559664 is about 21108.2842505022. The cubic root of 445559664 is about 763.7805990796.

The spelling of 445559664 in words is "four hundred forty-five million, five hundred fifty-nine thousand, six hundred sixty-four".