64564165505 has 16 divisors (see below), whose sum is σ = 89131540224. Its totient is φ = 43979371200.

The previous prime is 64564165469. The next prime is 64564165529. The reversal of 64564165505 is 50556146546.

It is not a de Polignac number, because 64564165505 - 2⁸ = 64564165249 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 64564165505.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 6102962 + ... + 6113531.

It is an arithmetic number, because the mean of its divisors is an integer number (5570721264).

Almost surely, 2^64564165505 is an apocalyptic number.

It is an amenable number.

64564165505 is a deficient number, since it is larger than the sum of its proper divisors (24567374719).

64564165505 is a wasteful number, since it uses less digits than its factorization.

64564165505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12216656.

The product of its (nonzero) digits is 2160000, while the sum is 47.

The spelling of 64564165505 in words is "sixty-four billion, five hundred sixty-four million, one hundred sixty-five thousand, five hundred five".