85716781161 has 32 divisors (see below), whose sum is σ = 124960002048. Its totient is φ = 51832631040.

The previous prime is 85716781153. The next prime is 85716781193. The reversal of 85716781161 is 16118761758.

It is not a de Polignac number, because 85716781161 - 2³ = 85716781153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85716780161) 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 31 ways as a sum of consecutive naturals, for example, 48235905 + ... + 48237681.

It is an arithmetic number, because the mean of its divisors is an integer number (3905000064).

Almost surely, 2^85716781161 is an apocalyptic number.

It is an amenable number.

85716781161 is a deficient number, since it is larger than the sum of its proper divisors (39243220887).

85716781161 is a wasteful number, since it uses less digits than its factorization.

85716781161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4261.

The product of its digits is 564480, while the sum is 51.

The spelling of 85716781161 in words is "eighty-five billion, seven hundred sixteen million, seven hundred eighty-one thousand, one hundred sixty-one".