80821715184281 has 2 divisors, whose sum is σ = 80821715184282. Its totient is φ = 80821715184280.

The previous prime is 80821715184181. The next prime is 80821715184293. The reversal of 80821715184281 is 18248151712808.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68344677863056 + 12477037321225 = 8267084^2 + 3532285^2 .

It is a cyclic number.

It is not a de Polignac number, because 80821715184281 - 2⁴⁶ = 10452971006617 is a prime.

It is a super-2 number, since 2×80821715184281² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (80821715184181) 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, 40410857592140 + 40410857592141.

It is an arithmetic number, because the mean of its divisors is an integer number (40410857592141).

Almost surely, 2^{80821715184281} is an apocalyptic number.

It is an amenable number.

80821715184281 is a deficient number, since it is larger than the sum of its proper divisors (1).

80821715184281 is an equidigital number, since it uses as much as digits as its factorization.

80821715184281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2293760, while the sum is 56.

The spelling of 80821715184281 in words is "eighty trillion, eight hundred twenty-one billion, seven hundred fifteen million, one hundred eighty-four thousand, two hundred eighty-one".