6445112656 has 20 divisors (see below), whose sum is σ = 12918006900. Its totient is φ = 3111433472.

The previous prime is 6445112651. The next prime is 6445112669. The reversal of 6445112656 is 6562115446.

It can be written as a sum of positive squares in 2 ways, for example, as 3340840000 + 3104272656 = 57800^2 + 55716^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6445112651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6944701 + ... + 6945628.

It is an arithmetic number, because the mean of its divisors is an integer number (645900345).

Almost surely, 2^6445112656 is an apocalyptic number.

It is an amenable number.

6445112656 is an abundant number, since it is smaller than the sum of its proper divisors (6472894244).

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

6445112656 is a wasteful number, since it uses less digits than its factorization.

6445112656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13890366 (or 13890360 counting only the distinct ones).

The product of its digits is 172800, while the sum is 40.

The square root of 6445112656 is about 80281.4589802652. The cubic root of 6445112656 is about 1860.9877068048.

The spelling of 6445112656 in words is "six billion, four hundred forty-five million, one hundred twelve thousand, six hundred fifty-six".