82716857158777 has 4 divisors (see below), whose sum is σ = 84952447892836. Its totient is φ = 80481266424720.

The previous prime is 82716857158721. The next prime is 82716857158811. The reversal of 82716857158777 is 77785175861728.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 68342363099136 + 14374494059641 = 8266944^2 + 3791371^2 .

It is a cyclic number.

It is not a de Polignac number, because 82716857158777 - 2¹¹ = 82716857156729 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 82716857158697 and 82716857158706.

It is not an unprimeable number, because it can be changed into a prime (82710857158777) 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, 1117795366974 + ... + 1117795367047.

It is an arithmetic number, because the mean of its divisors is an integer number (21238111973209).

Almost surely, 2^{82716857158777} is an apocalyptic number.

It is an amenable number.

82716857158777 is a deficient number, since it is larger than the sum of its proper divisors (2235590734059).

82716857158777 is a wasteful number, since it uses less digits than its factorization.

82716857158777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2235590734058.

The product of its digits is 2581555200, while the sum is 79.

The spelling of 82716857158777 in words is "eighty-two trillion, seven hundred sixteen billion, eight hundred fifty-seven million, one hundred fifty-eight thousand, seven hundred seventy-seven".