444459687660 has 144 divisors (see below), whose sum is σ = 1430327808000. Its totient is φ = 111400313472.

The previous prime is 444459687611. The next prime is 444459687691. The reversal of 444459687660 is 66786954444.

It is a happy number.

444459687660 is a `hidden beast` number, since 4 + 4 + 445 + 9 + 68 + 76 + 60 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 77310 + ... + 945989.

It is an arithmetic number, because the mean of its divisors is an integer number (9932832000).

Almost surely, 2^444459687660 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 444459687660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (715163904000).

444459687660 is an abundant number, since it is smaller than the sum of its proper divisors (985868120340).

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

444459687660 is a wasteful number, since it uses less digits than its factorization.

444459687660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023460 (or 1023455 counting only the distinct ones).

The product of its (nonzero) digits is 139345920, while the sum is 63.

The spelling of 444459687660 in words is "four hundred forty-four billion, four hundred fifty-nine million, six hundred eighty-seven thousand, six hundred sixty".