64164317617 has 4 divisors (see below), whose sum is σ = 64184315940. Its totient is φ = 64144319296.

The previous prime is 64164317579. The next prime is 64164317627. The reversal of 64164317617 is 71671346146.

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 25895568241 + 38268749376 = 160921^2 + 195624^2 .

It is a cyclic number.

It is not a de Polignac number, because 64164317617 - 2³⁵ = 29804579249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64164317627) 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, 9994348 + ... + 10000765.

It is an arithmetic number, because the mean of its divisors is an integer number (16046078985).

Almost surely, 2^64164317617 is an apocalyptic number.

It is an amenable number.

64164317617 is a deficient number, since it is larger than the sum of its proper divisors (19998323).

64164317617 is a wasteful number, since it uses less digits than its factorization.

64164317617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19998322.

The product of its digits is 508032, while the sum is 46.

The spelling of 64164317617 in words is "sixty-four billion, one hundred sixty-four million, three hundred seventeen thousand, six hundred seventeen".