6440606006444 has 12 divisors (see below), whose sum is σ = 11271093745464. Its totient is φ = 3220293507744.

The previous prime is 6440606006441. The next prime is 6440606006503. The reversal of 6440606006444 is 4446006060446.

It is a junction number, because it is equal to n+sod(n) for n = 6440606006395 and 6440606006404.

It is not an unprimeable number, because it can be changed into a prime (6440606006441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 719657 + ... + 3660480.

It is an arithmetic number, because the mean of its divisors is an integer number (939257812122).

Almost surely, 2^{6440606006444} is an apocalyptic number.

It is an amenable number.

6440606006444 is a deficient number, since it is larger than the sum of its proper divisors (4830487739020).

6440606006444 is a wasteful number, since it uses less digits than its factorization.

6440606006444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4747744 (or 4747742 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 44.

The spelling of 6440606006444 in words is "six trillion, four hundred forty billion, six hundred six million, six thousand, four hundred forty-four".