85115851111 has 2 divisors, whose sum is σ = 85115851112. Its totient is φ = 85115851110.

The previous prime is 85115851109. The next prime is 85115851241. The reversal of 85115851111 is 11115851158.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85115851111 - 2¹ = 85115851109 is a prime.

It is a super-2 number, since 2×85115851111² (a number of 23 digits) contains 22 as substring.

Together with 85115851109, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85115851811) 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 as a sum of consecutive naturals, namely, 42557925555 + 42557925556.

It is an arithmetic number, because the mean of its divisors is an integer number (42557925556).

Almost surely, 2^85115851111 is an apocalyptic number.

85115851111 is a deficient number, since it is larger than the sum of its proper divisors (1).

85115851111 is an equidigital number, since it uses as much as digits as its factorization.

85115851111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8000, while the sum is 37.

The spelling of 85115851111 in words is "eighty-five billion, one hundred fifteen million, eight hundred fifty-one thousand, one hundred eleven".