6438545812 has 24 divisors (see below), whose sum is σ = 11324214720. Its totient is φ = 3203097600.

The previous prime is 6438545807. The next prime is 6438545819. The reversal of 6438545812 is 2185458346.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6438545819) 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, 665812 + ... + 675412.

It is an arithmetic number, because the mean of its divisors is an integer number (471842280).

Almost surely, 2^6438545812 is an apocalyptic number.

It is an amenable number.

6438545812 is a deficient number, since it is larger than the sum of its proper divisors (4885668908).

6438545812 is a wasteful number, since it uses less digits than its factorization.

6438545812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10431 (or 10429 counting only the distinct ones).

The product of its digits is 921600, while the sum is 46.

The square root of 6438545812 is about 80240.5496740893. The cubic root of 6438545812 is about 1860.3554463874.

The spelling of 6438545812 in words is "six billion, four hundred thirty-eight million, five hundred forty-five thousand, eight hundred twelve".