81232086848309 has 2 divisors, whose sum is σ = 81232086848310. Its totient is φ = 81232086848308.

The previous prime is 81232086848291. The next prime is 81232086848327. The reversal of 81232086848309 is 90384868023218.

It is a balanced prime because it is at equal distance from previous prime (81232086848291) and next prime (81232086848327).

It can be written as a sum of positive squares in only one way, i.e., 79370013730225 + 1862073118084 = 8908985^2 + 1364578^2 .

It is a cyclic number.

It is not a de Polignac number, because 81232086848309 - 2²⁸ = 81231818412853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81232086848359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40616043424154 + 40616043424155.

It is an arithmetic number, because the mean of its divisors is an integer number (40616043424155).

Almost surely, 2^{81232086848309} is an apocalyptic number.

It is an amenable number.

81232086848309 is a deficient number, since it is larger than the sum of its proper divisors (1).

81232086848309 is an equidigital number, since it uses as much as digits as its factorization.

81232086848309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31850496, while the sum is 62.

The spelling of 81232086848309 in words is "eighty-one trillion, two hundred thirty-two billion, eighty-six million, eight hundred forty-eight thousand, three hundred nine".