82690522596821 has 2 divisors, whose sum is σ = 82690522596822. Its totient is φ = 82690522596820.

The previous prime is 82690522596739. The next prime is 82690522596881. The reversal of 82690522596821 is 12869522509628.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59356454210596 + 23334068386225 = 7704314^2 + 4830535^2 .

It is a cyclic number.

It is not a de Polignac number, because 82690522596821 - 2¹⁰ = 82690522595797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82690522596881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41345261298410 + 41345261298411.

It is an arithmetic number, because the mean of its divisors is an integer number (41345261298411).

Almost surely, 2^{82690522596821} is an apocalyptic number.

It is an amenable number.

82690522596821 is a deficient number, since it is larger than the sum of its proper divisors (1).

82690522596821 is an equidigital number, since it uses as much as digits as its factorization.

82690522596821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 74649600, while the sum is 65.

The spelling of 82690522596821 in words is "eighty-two trillion, six hundred ninety billion, five hundred twenty-two million, five hundred ninety-six thousand, eight hundred twenty-one".