85865533567847 has 4 divisors (see below), whose sum is σ = 93671491164936. Its totient is φ = 78059575970760.

The previous prime is 85865533567843. The next prime is 85865533567871. The reversal of 85865533567847 is 74876533556858.

It is a happy number.

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 85865533567847 - 2² = 85865533567843 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 (85865533567843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3902978798528 + ... + 3902978798549.

It is an arithmetic number, because the mean of its divisors is an integer number (23417872791234).

Almost surely, 2^{85865533567847} is an apocalyptic number.

85865533567847 is a deficient number, since it is larger than the sum of its proper divisors (7805957597089).

85865533567847 is a wasteful number, since it uses less digits than its factorization.

85865533567847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7805957597088.

The product of its digits is 20321280000, while the sum is 80.

The spelling of 85865533567847 in words is "eighty-five trillion, eight hundred sixty-five billion, five hundred thirty-three million, five hundred sixty-seven thousand, eight hundred forty-seven".