85216648313 has 4 divisors (see below), whose sum is σ = 85494227280. Its totient is φ = 84939069348.

The previous prime is 85216648301. The next prime is 85216648327. The reversal of 85216648313 is 31384661258.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31384661258 = 2 ⋅15692330629.

It is a cyclic number.

It is not a de Polignac number, because 85216648313 - 2¹⁸ = 85216386169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85216648513) 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, 138789023 + ... + 138789636.

It is an arithmetic number, because the mean of its divisors is an integer number (21373556820).

Almost surely, 2^85216648313 is an apocalyptic number.

It is an amenable number.

85216648313 is a deficient number, since it is larger than the sum of its proper divisors (277578967).

85216648313 is a wasteful number, since it uses less digits than its factorization.

85216648313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277578966.

The product of its digits is 829440, while the sum is 47.

The spelling of 85216648313 in words is "eighty-five billion, two hundred sixteen million, six hundred forty-eight thousand, three hundred thirteen".