82140636449393 has 2 divisors, whose sum is σ = 82140636449394. Its totient is φ = 82140636449392.

The previous prime is 82140636449383. The next prime is 82140636449407. The reversal of 82140636449393 is 39394463604128.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75918320724544 + 6222315724849 = 8713112^2 + 2494457^2 .

It is a cyclic number.

It is not a de Polignac number, because 82140636449393 - 2⁴² = 77742589938289 is a prime.

It is a super-2 number, since 2×82140636449393² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (82140636449383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41070318224696 + 41070318224697.

It is an arithmetic number, because the mean of its divisors is an integer number (41070318224697).

Almost surely, 2^{82140636449393} is an apocalyptic number.

It is an amenable number.

82140636449393 is a deficient number, since it is larger than the sum of its proper divisors (1).

82140636449393 is an equidigital number, since it uses as much as digits as its factorization.

82140636449393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80621568, while the sum is 62.

The spelling of 82140636449393 in words is "eighty-two trillion, one hundred forty billion, six hundred thirty-six million, four hundred forty-nine thousand, three hundred ninety-three".