444026660561664 has 72 divisors (see below), whose sum is σ = 1181762076541872. Its totient is φ = 148008433397760.

The previous prime is 444026660561611. The next prime is 444026660561681. The reversal of 444026660561664 is 466165066620444.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 444026660561598 and 444026660561607.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 330747454 + ... + 332087234.

Almost surely, 2^{444026660561664} is an apocalyptic number.

It is an amenable number.

444026660561664 is an abundant number, since it is smaller than the sum of its proper divisors (737735415980208).

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

444026660561664 is a wasteful number, since it uses less digits than its factorization.

444026660561664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1771333 (or 1771319 counting only the distinct ones).

The product of its (nonzero) digits is 119439360, while the sum is 60.

The spelling of 444026660561664 in words is "four hundred forty-four trillion, twenty-six billion, six hundred sixty million, five hundred sixty-one thousand, six hundred sixty-four".