64006513 has 4 divisors (see below), whose sum is σ = 67771620. Its totient is φ = 60241408.

The previous prime is 64006499. The next prime is 64006531. The reversal of 64006513 is 31560046.

64006513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 38725729 + 25280784 = 6223^2 + 5028^2 .

It is a cyclic number.

It is not a de Polignac number, because 64006513 - 2²¹ = 61909361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64006543) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1882528 + ... + 1882561.

It is an arithmetic number, because the mean of its divisors is an integer number (16942905).

Almost surely, 2^64006513 is an apocalyptic number.

It is an amenable number.

64006513 is a deficient number, since it is larger than the sum of its proper divisors (3765107).

64006513 is a wasteful number, since it uses less digits than its factorization.

64006513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3765106.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 64006513 is about 8000.4070521443. The cubic root of 64006513 is about 400.0135682897.

Adding to 64006513 its reverse (31560046), we get a palindrome (95566559).

The spelling of 64006513 in words is "sixty-four million, six thousand, five hundred thirteen".