64065523 has 4 divisors (see below), whose sum is σ = 64093960. Its totient is φ = 64037088.

The previous prime is 64065487. The next prime is 64065527. The reversal of 64065523 is 32556046.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64065523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64065527) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 10518 + ... + 15451.

It is an arithmetic number, because the mean of its divisors is an integer number (16023490).

Almost surely, 2^64065523 is an apocalyptic number.

64065523 is a deficient number, since it is larger than the sum of its proper divisors (28437).

64065523 is a wasteful number, since it uses less digits than its factorization.

64065523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28436.

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 64065523 is about 8004.0941398762. The cubic root of 64065523 is about 400.1364596916.

The spelling of 64065523 in words is "sixty-four million, sixty-five thousand, five hundred twenty-three".