6544145328 has 40 divisors (see below), whose sum is σ = 19320811008. Its totient is φ = 1869755712.

The previous prime is 6544145299. The next prime is 6544145339. The reversal of 6544145328 is 8235414456.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 6544145328.

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, 9737976 + ... + 9738647.

Almost surely, 2^6544145328 is an apocalyptic number.

It is an amenable number.

6544145328 is an abundant number, since it is smaller than the sum of its proper divisors (12776665680).

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

6544145328 is a wasteful number, since it uses less digits than its factorization.

6544145328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19476641 (or 19476635 counting only the distinct ones).

The product of its digits is 460800, while the sum is 42.

The square root of 6544145328 is about 80895.8919105291. The cubic root of 6544145328 is about 1870.4709965384.

The spelling of 6544145328 in words is "six billion, five hundred forty-four million, one hundred forty-five thousand, three hundred twenty-eight".