6722318638 has 32 divisors (see below), whose sum is σ = 11816711424. Its totient is φ = 2808698112.

The previous prime is 6722318611. The next prime is 6722318641. The reversal of 6722318638 is 8368132276.

6722318638 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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, 54045 + ... + 127927.

It is an arithmetic number, because the mean of its divisors is an integer number (369272232).

Almost surely, 2^6722318638 is an apocalyptic number.

6722318638 is a deficient number, since it is larger than the sum of its proper divisors (5094392786).

6722318638 is a wasteful number, since it uses less digits than its factorization.

6722318638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74056.

The product of its digits is 580608, while the sum is 46.

The square root of 6722318638 is about 81989.7471517018. The cubic root of 6722318638 is about 1887.2946033708.

The spelling of 6722318638 in words is "six billion, seven hundred twenty-two million, three hundred eighteen thousand, six hundred thirty-eight".