6445718626 has 16 divisors (see below), whose sum is σ = 9737262720. Its totient is φ = 3200043280.

The previous prime is 6445718581. The next prime is 6445718641. The reversal of 6445718626 is 6268175446.

It is a self number, because there is not a number n which added to its sum of digits gives 6445718626.

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, 146436 + ... + 185296.

It is an arithmetic number, because the mean of its divisors is an integer number (608578920).

Almost surely, 2^6445718626 is an apocalyptic number.

6445718626 is a deficient number, since it is larger than the sum of its proper divisors (3291544094).

6445718626 is a wasteful number, since it uses less digits than its factorization.

6445718626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39449.

The product of its digits is 1935360, while the sum is 49.

The square root of 6445718626 is about 80285.2329261116. The cubic root of 6445718626 is about 1861.0460283806.

The spelling of 6445718626 in words is "six billion, four hundred forty-five million, seven hundred eighteen thousand, six hundred twenty-six".