6440450287705 has 16 divisors (see below), whose sum is σ = 8835522194304. Its totient is φ = 4414856440320.

The previous prime is 6440450287703. The next prime is 6440450287723. The reversal of 6440450287705 is 5077820540446.

It is not a de Polignac number, because 6440450287705 - 2¹ = 6440450287703 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6440450287703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30148887 + ... + 30361756.

It is an arithmetic number, because the mean of its divisors is an integer number (552220137144).

Almost surely, 2^{6440450287705} is an apocalyptic number.

It is an amenable number.

6440450287705 is a deficient number, since it is larger than the sum of its proper divisors (2395071906599).

6440450287705 is a wasteful number, since it uses less digits than its factorization.

6440450287705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60513696.

The product of its (nonzero) digits is 7526400, while the sum is 52.

The spelling of 6440450287705 in words is "six trillion, four hundred forty billion, four hundred fifty million, two hundred eighty-seven thousand, seven hundred five".