85927691917 has 4 divisors (see below), whose sum is σ = 85983818656. Its totient is φ = 85871565180.

The previous prime is 85927691909. The next prime is 85927691939. The reversal of 85927691917 is 71919672958.

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.

It is a cyclic number.

It is not a de Polignac number, because 85927691917 - 2³ = 85927691909 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 (85927691947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28061073 + ... + 28064134.

It is an arithmetic number, because the mean of its divisors is an integer number (21495954664).

Almost surely, 2^85927691917 is an apocalyptic number.

It is an amenable number.

85927691917 is a deficient number, since it is larger than the sum of its proper divisors (56126739).

85927691917 is a wasteful number, since it uses less digits than its factorization.

85927691917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56126738.

The product of its digits is 17146080, while the sum is 64.

The spelling of 85927691917 in words is "eighty-five billion, nine hundred twenty-seven million, six hundred ninety-one thousand, nine hundred seventeen".