64565641 has 8 divisors (see below), whose sum is σ = 74173184. Its totient is φ = 55054080.

The previous prime is 64565621. The next prime is 64565659. The reversal of 64565641 is 14656546.

64565641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 64565641 - 2¹⁹ = 64041353 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64565641.

It is not an unprimeable number, because it can be changed into a prime (64565621) 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 7 ways as a sum of consecutive naturals, for example, 22545 + ... + 25246.

It is an arithmetic number, because the mean of its divisors is an integer number (9271648).

Almost surely, 2^64565641 is an apocalyptic number.

It is an amenable number.

64565641 is a deficient number, since it is larger than the sum of its proper divisors (9607543).

64565641 is a wasteful number, since it uses less digits than its factorization.

64565641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47991.

The product of its digits is 86400, while the sum is 37.

The square root of 64565641 is about 8035.2747930609. The cubic root of 64565641 is about 401.1749640195.

The spelling of 64565641 in words is "sixty-four million, five hundred sixty-five thousand, six hundred forty-one".