64475289173 has 4 divisors (see below), whose sum is σ = 68267953260. Its totient is φ = 60682625088.

The previous prime is 64475289167. The next prime is 64475289227. The reversal of 64475289173 is 37198257446.

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 41711118289 + 22764170884 = 204233^2 + 150878^2 .

It is a cyclic number.

It is not a de Polignac number, because 64475289173 - 2¹⁰ = 64475288149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64475286173) 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, 1896332018 + ... + 1896332051.

It is an arithmetic number, because the mean of its divisors is an integer number (17066988315).

Almost surely, 2^64475289173 is an apocalyptic number.

It is an amenable number.

64475289173 is a deficient number, since it is larger than the sum of its proper divisors (3792664087).

64475289173 is a wasteful number, since it uses less digits than its factorization.

64475289173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3792664086.

The product of its digits is 10160640, while the sum is 56.

The spelling of 64475289173 in words is "sixty-four billion, four hundred seventy-five million, two hundred eighty-nine thousand, one hundred seventy-three".