82665438768049 has 2 divisors, whose sum is σ = 82665438768050. Its totient is φ = 82665438768048.

The previous prime is 82665438768007. The next prime is 82665438768071. The reversal of 82665438768049 is 94086783456628.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72516550392225 + 10148888375824 = 8515665^2 + 3185732^2 .

It is a cyclic number.

It is not a de Polignac number, because 82665438768049 - 2³³ = 82656848833457 is a prime.

It is not a weakly prime, because it can be changed into another prime (82665438768089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41332719384024 + 41332719384025.

It is an arithmetic number, because the mean of its divisors is an integer number (41332719384025).

Almost surely, 2^{82665438768049} is an apocalyptic number.

It is an amenable number.

82665438768049 is a deficient number, since it is larger than the sum of its proper divisors (1).

82665438768049 is an equidigital number, since it uses as much as digits as its factorization.

82665438768049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3344302080, while the sum is 76.

The spelling of 82665438768049 in words is "eighty-two trillion, six hundred sixty-five billion, four hundred thirty-eight million, seven hundred sixty-eight thousand, forty-nine".