64352170609 has 4 divisors (see below), whose sum is σ = 64762057204. Its totient is φ = 63942284016.

The previous prime is 64352170579. The next prime is 64352170627. The reversal of 64352170609 is 90607125346.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90607125346 = 2 ⋅45303562673.

It can be written as a sum of positive squares in 2 ways, for example, as 48420682209 + 15931488400 = 220047^2 + 126220^2 .

It is a cyclic number.

It is not a de Polignac number, because 64352170609 - 2⁵ = 64352170577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64352170639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204943062 + ... + 204943375.

It is an arithmetic number, because the mean of its divisors is an integer number (16190514301).

Almost surely, 2^64352170609 is an apocalyptic number.

It is an amenable number.

64352170609 is a deficient number, since it is larger than the sum of its proper divisors (409886595).

64352170609 is a wasteful number, since it uses less digits than its factorization.

64352170609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409886594.

The product of its (nonzero) digits is 272160, while the sum is 43.

The spelling of 64352170609 in words is "sixty-four billion, three hundred fifty-two million, one hundred seventy thousand, six hundred nine".