6468448646 has 16 divisors (see below), whose sum is σ = 10689537168. Its totient is φ = 2911092000.

The previous prime is 6468448627. The next prime is 6468448661.

6468448646 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 6468448591 and 6468448600.

It is a congruent number.

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, 1453325 + ... + 1457768.

It is an arithmetic number, because the mean of its divisors is an integer number (668096073).

Almost surely, 2^6468448646 is an apocalyptic number.

6468448646 is a deficient number, since it is larger than the sum of its proper divisors (4221088522).

6468448646 is a wasteful number, since it uses less digits than its factorization.

6468448646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2911207.

The product of its digits is 21233664, while the sum is 56.

The square root of 6468448646 is about 80426.6662618811. Note that the first 3 decimals coincide. The cubic root of 6468448646 is about 1863.2310439598.

The spelling of 6468448646 in words is "six billion, four hundred sixty-eight million, four hundred forty-eight thousand, six hundred forty-six".