6443707868 has 48 divisors (see below), whose sum is σ = 12371214240. Its totient is φ = 2918851584.

The previous prime is 6443707843. The next prime is 6443707877. The reversal of 6443707868 is 8687073446.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 628955 + ... + 639117.

It is an arithmetic number, because the mean of its divisors is an integer number (257733630).

Almost surely, 2^6443707868 is an apocalyptic number.

It is an amenable number.

6443707868 is a deficient number, since it is larger than the sum of its proper divisors (5927506372).

6443707868 is a wasteful number, since it uses less digits than its factorization.

6443707868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10406 (or 10404 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 53.

The square root of 6443707868 is about 80272.7093600309. The cubic root of 6443707868 is about 1860.8524889376.

The spelling of 6443707868 in words is "six billion, four hundred forty-three million, seven hundred seven thousand, eight hundred sixty-eight".