64530561 has 8 divisors (see below), whose sum is σ = 88816384. Its totient is φ = 41632560.

The previous prime is 64530541. The next prime is 64530629. The reversal of 64530561 is 16503546.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64530561 - 2¹⁰ = 64529537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64530541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 346846 + ... + 347031.

It is an arithmetic number, because the mean of its divisors is an integer number (11102048).

Almost surely, 2^64530561 is an apocalyptic number.

It is an amenable number.

64530561 is a deficient number, since it is larger than the sum of its proper divisors (24285823).

64530561 is a wasteful number, since it uses less digits than its factorization.

64530561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693911.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 64530561 is about 8033.0916215365. The cubic root of 64530561 is about 401.1022949907.

The spelling of 64530561 in words is "sixty-four million, five hundred thirty thousand, five hundred sixty-one".