6643814831374 has 16 divisors (see below), whose sum is σ = 11390388287616. Its totient is φ = 2847101355000.

The previous prime is 6643814831359. The next prime is 6643814831387. The reversal of 6643814831374 is 4731384183466.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20488252 + ... + 20809999.

It is an arithmetic number, because the mean of its divisors is an integer number (711899267976).

Almost surely, 2^{6643814831374} is an apocalyptic number.

6643814831374 is a deficient number, since it is larger than the sum of its proper divisors (4746573456242).

6643814831374 is a wasteful number, since it uses less digits than its factorization.

6643814831374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41309751.

The product of its digits is 27869184, while the sum is 58.

The spelling of 6643814831374 in words is "six trillion, six hundred forty-three billion, eight hundred fourteen million, eight hundred thirty-one thousand, three hundred seventy-four".