6444262044440 has 64 divisors (see below), whose sum is σ = 16505461704960. Its totient is φ = 2241482446720.

The previous prime is 6444262044421. The next prime is 6444262044449. The reversal of 6444262044440 is 444402624446.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 6444262044391 and 6444262044400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6444262044449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 318382274 + ... + 318402513.

It is an arithmetic number, because the mean of its divisors is an integer number (257897839140).

Almost surely, 2^{6444262044440} is an apocalyptic number.

It is an amenable number.

6444262044440 is an abundant number, since it is smaller than the sum of its proper divisors (10061199660520).

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

6444262044440 is a wasteful number, since it uses less digits than its factorization.

6444262044440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636784832 (or 636784828 counting only the distinct ones).

The product of its (nonzero) digits is 2359296, while the sum is 44.

Adding to 6444262044440 its reverse (444402624446), we get a palindrome (6888664668886).

The spelling of 6444262044440 in words is "six trillion, four hundred forty-four billion, two hundred sixty-two million, forty-four thousand, four hundred forty".