82065830621 has 2 divisors, whose sum is σ = 82065830622. Its totient is φ = 82065830620.

The previous prime is 82065830573. The next prime is 82065830633. The reversal of 82065830621 is 12603856028.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75707522500 + 6358308121 = 275150^2 + 79739^2 .

It is a cyclic number.

It is not a de Polignac number, because 82065830621 - 2²² = 82061636317 is a prime.

It is a super-2 number, since 2×82065830621² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82065830221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41032915310 + 41032915311.

It is an arithmetic number, because the mean of its divisors is an integer number (41032915311).

Almost surely, 2^82065830621 is an apocalyptic number.

It is an amenable number.

82065830621 is a deficient number, since it is larger than the sum of its proper divisors (1).

82065830621 is an equidigital number, since it uses as much as digits as its factorization.

82065830621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 138240, while the sum is 41.

The spelling of 82065830621 in words is "eighty-two billion, sixty-five million, eight hundred thirty thousand, six hundred twenty-one".