6344432540 has 24 divisors (see below), whose sum is σ = 13355900880. Its totient is φ = 2531564928.

The previous prime is 6344432489. The next prime is 6344432579. The reversal of 6344432540 is 452344436.

It is a super-2 number, since 2×6344432540² = 80503648509221703200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6344432540.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 379622 + ... + 395981.

It is an arithmetic number, because the mean of its divisors is an integer number (556495870).

Almost surely, 2^6344432540 is an apocalyptic number.

It is an amenable number.

6344432540 is an abundant number, since it is smaller than the sum of its proper divisors (7011468340).

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

6344432540 is a wasteful number, since it uses less digits than its factorization.

6344432540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776021 (or 776019 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 35.

The square root of 6344432540 is about 79651.9462411309. The cubic root of 6344432540 is about 1851.2465462909.

Adding to 6344432540 its reverse (452344436), we get a palindrome (6796776976).

The spelling of 6344432540 in words is "six billion, three hundred forty-four million, four hundred thirty-two thousand, five hundred forty".