6447383986 has 16 divisors (see below), whose sum is σ = 9738001728. Its totient is φ = 3201433200.

The previous prime is 6447383941. The next prime is 6447384007. The reversal of 6447383986 is 6893837446.

It is a self number, because there is not a number n which added to its sum of digits gives 6447383986.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256981 + ... + 280951.

It is an arithmetic number, because the mean of its divisors is an integer number (608625108).

Almost surely, 2^6447383986 is an apocalyptic number.

6447383986 is a deficient number, since it is larger than the sum of its proper divisors (3290617742).

6447383986 is a wasteful number, since it uses less digits than its factorization.

6447383986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24897.

The product of its digits is 20901888, while the sum is 58.

The square root of 6447383986 is about 80295.6037775419. The cubic root of 6447383986 is about 1861.2062921108.

The spelling of 6447383986 in words is "six billion, four hundred forty-seven million, three hundred eighty-three thousand, nine hundred eighty-six".