6440562403244 has 24 divisors (see below), whose sum is σ = 11918334212736. Its totient is φ = 3040391376000.

The previous prime is 6440562403183. The next prime is 6440562403273. The reversal of 6440562403244 is 4423042650446.

It is a junction number, because it is equal to n+sod(n) for n = 6440562403195 and 6440562403204.

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, 633409787 + ... + 633419954.

It is an arithmetic number, because the mean of its divisors is an integer number (496597258864).

Almost surely, 2^{6440562403244} is an apocalyptic number.

It is an amenable number.

6440562403244 is a deficient number, since it is larger than the sum of its proper divisors (5477771809492).

6440562403244 is a wasteful number, since it uses less digits than its factorization.

6440562403244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1266829817 (or 1266829815 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 44.

The spelling of 6440562403244 in words is "six trillion, four hundred forty billion, five hundred sixty-two million, four hundred three thousand, two hundred forty-four".