6445991833068 has 24 divisors (see below), whose sum is σ = 15041366504640. Its totient is φ = 2148561245200.

The previous prime is 6445991833031. The next prime is 6445991833087. The reversal of 6445991833068 is 8603381995446.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12575658 + ... + 13078193.

It is an arithmetic number, because the mean of its divisors is an integer number (626723604360).

Almost surely, 2^{6445991833068} is an apocalyptic number.

It is an amenable number.

6445991833068 is an abundant number, since it is smaller than the sum of its proper divisors (8595374671572).

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

6445991833068 is a wasteful number, since it uses less digits than its factorization.

6445991833068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25674797 (or 25674795 counting only the distinct ones).

The product of its (nonzero) digits is 134369280, while the sum is 66.

The spelling of 6445991833068 in words is "six trillion, four hundred forty-five billion, nine hundred ninety-one million, eight hundred thirty-three thousand, sixty-eight".