6438410566 has 48 divisors (see below), whose sum is σ = 11844759600. Its totient is φ = 2609869248.

The previous prime is 6438410557. The next prime is 6438410579. The reversal of 6438410566 is 6650148346.

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 23 ways as a sum of consecutive naturals, for example, 1317720 + ... + 1322596.

It is an arithmetic number, because the mean of its divisors is an integer number (246765825).

Almost surely, 2^6438410566 is an apocalyptic number.

6438410566 is a deficient number, since it is larger than the sum of its proper divisors (5406349034).

6438410566 is a wasteful number, since it uses less digits than its factorization.

6438410566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5621 (or 5614 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 43.

The square root of 6438410566 is about 80239.7069162145. The cubic root of 6438410566 is about 1860.3424202890.

The spelling of 6438410566 in words is "six billion, four hundred thirty-eight million, four hundred ten thousand, five hundred sixty-six".