6439066442016 has 144 divisors (see below), whose sum is σ = 18326973579264. Its totient is φ = 1978630198272.

The previous prime is 6439066441967. The next prime is 6439066442021. The reversal of 6439066442016 is 6102446609346.

It is a self number, because there is not a number n which added to its sum of digits gives 6439066442016.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12019425 + ... + 12543711.

It is an arithmetic number, because the mean of its divisors is an integer number (127270649856).

Almost surely, 2^{6439066442016} 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 6439066442016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9163486789632).

6439066442016 is an abundant number, since it is smaller than the sum of its proper divisors (11887907137248).

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

6439066442016 is a wasteful number, since it uses less digits than its factorization.

6439066442016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525083 (or 525062 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 51.

The spelling of 6439066442016 in words is "six trillion, four hundred thirty-nine billion, sixty-six million, four hundred forty-two thousand, sixteen".