6643171744 has 48 divisors (see below), whose sum is σ = 14279702976. Its totient is φ = 3017088000.

The previous prime is 6643171741. The next prime is 6643171751. The reversal of 6643171744 is 4471713466.

It is a self number, because there is not a number n which added to its sum of digits gives 6643171744.

It is not an unprimeable number, because it can be changed into a prime (6643171741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 449269 + ... + 463819.

It is an arithmetic number, because the mean of its divisors is an integer number (297493812).

Almost surely, 2^6643171744 is an apocalyptic number.

It is an amenable number.

6643171744 is an abundant number, since it is smaller than the sum of its proper divisors (7636531232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6643171744 is a wasteful number, since it uses less digits than its factorization.

6643171744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15869 (or 15861 counting only the distinct ones).

The product of its digits is 338688, while the sum is 43.

The square root of 6643171744 is about 81505.6546749979. The cubic root of 6643171744 is about 1879.8584984792.

The spelling of 6643171744 in words is "six billion, six hundred forty-three million, one hundred seventy-one thousand, seven hundred forty-four".