6643319310768 has 320 divisors, whose sum is σ = 20532317847552. Its totient is φ = 1811005240320.

The previous prime is 6643319310731. The next prime is 6643319310779. The reversal of 6643319310768 is 8670139133466.

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 434849946 + ... + 434865222.

Almost surely, 2^{6643319310768} 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 6643319310768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10266158923776).

6643319310768 is an abundant number, since it is smaller than the sum of its proper divisors (13888998536784).

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

6643319310768 is a wasteful number, since it uses less digits than its factorization.

6643319310768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15912 (or 15906 counting only the distinct ones).

The product of its (nonzero) digits is 11757312, while the sum is 57.

The spelling of 6643319310768 in words is "six trillion, six hundred forty-three billion, three hundred nineteen million, three hundred ten thousand, seven hundred sixty-eight".