6440205306422 has 16 divisors (see below), whose sum is σ = 9666685974960. Its totient is φ = 3217977208992.

The previous prime is 6440205306419. The next prime is 6440205306439. The reversal of 6440205306422 is 2246035020446.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23480708 + ... + 23753400.

It is an arithmetic number, because the mean of its divisors is an integer number (604167873435).

Almost surely, 2^{6440205306422} is an apocalyptic number.

6440205306422 is a deficient number, since it is larger than the sum of its proper divisors (3226480668538).

6440205306422 is a wasteful number, since it uses less digits than its factorization.

6440205306422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280447.

The product of its (nonzero) digits is 276480, while the sum is 38.

The spelling of 6440205306422 in words is "six trillion, four hundred forty billion, two hundred five million, three hundred six thousand, four hundred twenty-two".