64505 has 16 divisors (see below), whose sum is σ = 94080. Its totient is φ = 41472.

The previous prime is 64499. The next prime is 64513. The reversal of 64505 is 50546.

It is a cyclic number.

It is not a de Polignac number, because 64505 - 2⁴ = 64489 is a prime.

It is a Curzon number.

It is a plaindrome in base 13.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 617 + ... + 713.

It is an arithmetic number, because the mean of its divisors is an integer number (5880).

2⁶⁴⁵⁰⁵ is an apocalyptic number.

It is an amenable number.

64505 is a deficient number, since it is larger than the sum of its proper divisors (29575).

64505 is a wasteful number, since it uses less digits than its factorization.

64505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 64505 is about 253.9783455336. The cubic root of 64505 is about 40.1049328202.

The spelling of 64505 in words is "sixty-four thousand, five hundred five".