85865512548617 has 4 divisors (see below), whose sum is σ = 88186202076996. Its totient is φ = 83544823020240.

The previous prime is 85865512548611. The next prime is 85865512548619. The reversal of 85865512548617 is 71684521556858.

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 79749704412361 + 6115808136256 = 8930269^2 + 2473016^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85865512548617 is a prime.

It is a super-3 number, since 3×85865512548617³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85865512548611) 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, 1160344764134 + ... + 1160344764207.

It is an arithmetic number, because the mean of its divisors is an integer number (22046550519249).

Almost surely, 2^{85865512548617} is an apocalyptic number.

It is an amenable number.

85865512548617 is a deficient number, since it is larger than the sum of its proper divisors (2320689528379).

85865512548617 is a wasteful number, since it uses less digits than its factorization.

85865512548617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2320689528378.

The product of its digits is 645120000, while the sum is 71.

The spelling of 85865512548617 in words is "eighty-five trillion, eight hundred sixty-five billion, five hundred twelve million, five hundred forty-eight thousand, six hundred seventeen".