64544 has 12 divisors (see below), whose sum is σ = 127134. Its totient is φ = 32256.

The previous prime is 64513. The next prime is 64553. The reversal of 64544 is 44546.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 44944 + 19600 = 212^2 + 140^2 .

It is a plaindrome in base 13.

It is a nialpdrome in base 16.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 64544.

It is an unprimeable number.

64544 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 977 + ... + 1040.

2⁶⁴⁵⁴⁴ is an apocalyptic number.

It is an amenable number.

64544 is a deficient number, since it is larger than the sum of its proper divisors (62590).

64544 is a wasteful number, since it uses less digits than its factorization.

64544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2027 (or 2019 counting only the distinct ones).

The product of its digits is 1920, while the sum is 23.

The square root of 64544 is about 254.0551121312. The cubic root of 64544 is about 40.1130137300.

The spelling of 64544 in words is "sixty-four thousand, five hundred forty-four".