6447858582782 has 4 divisors (see below), whose sum is σ = 9671787874176. Its totient is φ = 3223929291390.

The previous prime is 6447858582733. The next prime is 6447858582791. The reversal of 6447858582782 is 2872858587446.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1611964645694 + ... + 1611964645697.

It is an arithmetic number, because the mean of its divisors is an integer number (2417946968544).

Almost surely, 2^{6447858582782} is an apocalyptic number.

6447858582782 is a deficient number, since it is larger than the sum of its proper divisors (3223929291394).

6447858582782 is a wasteful number, since it uses less digits than its factorization.

6447858582782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3223929291393.

The product of its digits is 1926758400, while the sum is 74.

The spelling of 6447858582782 in words is "six trillion, four hundred forty-seven billion, eight hundred fifty-eight million, five hundred eighty-two thousand, seven hundred eighty-two".