6444868732 has 24 divisors (see below), whose sum is σ = 11787302016. Its totient is φ = 3077506608.

The previous prime is 6444868711. The next prime is 6444868733. The reversal of 6444868732 is 2378684446.

It is a happy number.

It is a super-2 number, since 2×6444868732² = 83072665945422575648, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6444868732.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6444868733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4683 + ... + 113629.

It is an arithmetic number, because the mean of its divisors is an integer number (491137584).

Almost surely, 2^6444868732 is an apocalyptic number.

It is an amenable number.

6444868732 is a deficient number, since it is larger than the sum of its proper divisors (5342433284).

6444868732 is a wasteful number, since it uses less digits than its factorization.

6444868732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109617 (or 109615 counting only the distinct ones).

The product of its digits is 6193152, while the sum is 52.

The square root of 6444868732 is about 80279.9397857273. The cubic root of 6444868732 is about 1860.9642293102.

The spelling of 6444868732 in words is "six billion, four hundred forty-four million, eight hundred sixty-eight thousand, seven hundred thirty-two".