64589561 has 4 divisors (see below), whose sum is σ = 64673892. Its totient is φ = 64505232.

The previous prime is 64589513. The next prime is 64589593. The reversal of 64589561 is 16598546.

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 39137536 + 25452025 = 6256^2 + 5045^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64589561 is a prime.

It is a super-2 number, since 2×64589561² = 8343622780345442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64589501) 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, 41006 + ... + 42551.

It is an arithmetic number, because the mean of its divisors is an integer number (16168473).

Almost surely, 2^64589561 is an apocalyptic number.

It is an amenable number.

64589561 is a deficient number, since it is larger than the sum of its proper divisors (84331).

64589561 is an equidigital number, since it uses as much as digits as its factorization.

64589561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84330.

The product of its digits is 259200, while the sum is 44.

The square root of 64589561 is about 8036.7630921908. The cubic root of 64589561 is about 401.2244997592.

The spelling of 64589561 in words is "sixty-four million, five hundred eighty-nine thousand, five hundred sixty-one".