64320534169 has 4 divisors (see below), whose sum is σ = 64321104996. Its totient is φ = 64319963344.

The previous prime is 64320534163. The next prime is 64320534209. The reversal of 64320534169 is 96143502346.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 6660518544 + 57660015625 = 81612^2 + 240125^2 .

It is a cyclic number.

It is not a de Polignac number, because 64320534169 - 2²¹ = 64318437017 is a prime.

It is a super-2 number, since 2×64320534169² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64320534163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53674 + ... + 362659.

It is an arithmetic number, because the mean of its divisors is an integer number (16080276249).

Almost surely, 2^64320534169 is an apocalyptic number.

It is an amenable number.

64320534169 is a deficient number, since it is larger than the sum of its proper divisors (570827).

64320534169 is a wasteful number, since it uses less digits than its factorization.

64320534169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570826.

The product of its (nonzero) digits is 466560, while the sum is 43.

The spelling of 64320534169 in words is "sixty-four billion, three hundred twenty million, five hundred thirty-four thousand, one hundred sixty-nine".