65085717943 has 4 divisors (see below), whose sum is σ = 65092957888. Its totient is φ = 65078478000.

The previous prime is 65085717901. The next prime is 65085717947. The reversal of 65085717943 is 34971758056.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65085717943 - 2²⁵ = 65052163511 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 (65085717947) 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, 3606471 + ... + 3624472.

It is an arithmetic number, because the mean of its divisors is an integer number (16273239472).

Almost surely, 2^65085717943 is an apocalyptic number.

65085717943 is a deficient number, since it is larger than the sum of its proper divisors (7239945).

65085717943 is an equidigital number, since it uses as much as digits as its factorization.

65085717943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7239944.

The product of its (nonzero) digits is 6350400, while the sum is 55.

The spelling of 65085717943 in words is "sixty-five billion, eighty-five million, seven hundred seventeen thousand, nine hundred forty-three".