82262169721 has 2 divisors, whose sum is σ = 82262169722. Its totient is φ = 82262169720.

The previous prime is 82262169709. The next prime is 82262169763. The reversal of 82262169721 is 12796126228.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72556964496 + 9705205225 = 269364^2 + 98515^2 .

It is a cyclic number.

It is not a de Polignac number, because 82262169721 - 2⁷ = 82262169593 is a prime.

It is not a weakly prime, because it can be changed into another prime (82262169791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41131084860 + 41131084861.

It is an arithmetic number, because the mean of its divisors is an integer number (41131084861).

Almost surely, 2^82262169721 is an apocalyptic number.

It is an amenable number.

82262169721 is a deficient number, since it is larger than the sum of its proper divisors (1).

82262169721 is an equidigital number, since it uses as much as digits as its factorization.

82262169721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 46.

The spelling of 82262169721 in words is "eighty-two billion, two hundred sixty-two million, one hundred sixty-nine thousand, seven hundred twenty-one".