6447640467446 has 16 divisors (see below), whose sum is σ = 9781972317600. Its totient is φ = 3187189399680.

The previous prime is 6447640467431. The next prime is 6447640467449.

It is a happy number.

6447640467446 is nontrivially palindromic in base 10.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6447640467449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51530195 + ... + 51655166.

It is an arithmetic number, because the mean of its divisors is an integer number (611373269850).

Almost surely, 2^{6447640467446} is an apocalyptic number.

6447640467446 is a deficient number, since it is larger than the sum of its proper divisors (3334331850154).

6447640467446 is a wasteful number, since it uses less digits than its factorization.

6447640467446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103185719.

The product of its (nonzero) digits is 260112384, while the sum is 62.

The spelling of 6447640467446 in words is "six trillion, four hundred forty-seven billion, six hundred forty million, four hundred sixty-seven thousand, four hundred forty-six".