82568371321 has 2 divisors, whose sum is σ = 82568371322. Its totient is φ = 82568371320.

The previous prime is 82568371253. The next prime is 82568371337. The reversal of 82568371321 is 12317386528.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77317919721 + 5250451600 = 278061^2 + 72460^2 .

It is a cyclic number.

It is not a de Polignac number, because 82568371321 - 2¹⁵ = 82568338553 is a prime.

It is not a weakly prime, because it can be changed into another prime (82568371021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41284185660 + 41284185661.

It is an arithmetic number, because the mean of its divisors is an integer number (41284185661).

Almost surely, 2^82568371321 is an apocalyptic number.

It is an amenable number.

82568371321 is a deficient number, since it is larger than the sum of its proper divisors (1).

82568371321 is an equidigital number, since it uses as much as digits as its factorization.

82568371321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 483840, while the sum is 46.

The spelling of 82568371321 in words is "eighty-two billion, five hundred sixty-eight million, three hundred seventy-one thousand, three hundred twenty-one".