6544 has 10 divisors (see below), whose sum is σ = 12710. Its totient is φ = 3264.

The previous prime is 6529. The next prime is 6547. The reversal of 6544 is 4456.

6544 = T₂ + T₃ + ... + T₃₃.

It can be written as a sum of positive squares in only one way, i.e., 6400 + 144 = 80^2 + 12^2 .

It is a plaindrome in base 14.

It is a nialpdrome in base 9 and base 10.

It is not an unprimeable number, because it can be changed into a prime (6547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189 + ... + 220.

It is an arithmetic number, because the mean of its divisors is an integer number (1271).

2⁶⁵⁴⁴ is an apocalyptic number.

It is an amenable number.

6544 is a deficient number, since it is larger than the sum of its proper divisors (6166).

6544 is a wasteful number, since it uses less digits than its factorization.

6544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417 (or 411 counting only the distinct ones).

The product of its digits is 480, while the sum is 19.

The square root of 6544 is about 80.8949936646. The cubic root of 6544 is about 18.7045715038.

The spelling of 6544 in words is "six thousand, five hundred forty-four".