82867769861 has 2 divisors, whose sum is σ = 82867769862. Its totient is φ = 82867769860.

The previous prime is 82867769857. The next prime is 82867769863. The reversal of 82867769861 is 16896776828.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73413902500 + 9453867361 = 270950^2 + 97231^2 .

It is a cyclic number.

It is not a de Polignac number, because 82867769861 - 2² = 82867769857 is a prime.

Together with 82867769863, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 82867769791 and 82867769800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82867769863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41433884930 + 41433884931.

It is an arithmetic number, because the mean of its divisors is an integer number (41433884931).

Almost surely, 2^82867769861 is an apocalyptic number.

It is an amenable number.

82867769861 is a deficient number, since it is larger than the sum of its proper divisors (1).

82867769861 is an equidigital number, since it uses as much as digits as its factorization.

82867769861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 97542144, while the sum is 68.

The spelling of 82867769861 in words is "eighty-two billion, eight hundred sixty-seven million, seven hundred sixty-nine thousand, eight hundred sixty-one".