80221018517 has 2 divisors, whose sum is σ = 80221018518. Its totient is φ = 80221018516.

The previous prime is 80221018513. The next prime is 80221018543. The reversal of 80221018517 is 71581012208.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69127452241 + 11093566276 = 262921^2 + 105326^2 .

It is a cyclic number.

It is not a de Polignac number, because 80221018517 - 2² = 80221018513 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80221018513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40110509258 + 40110509259.

It is an arithmetic number, because the mean of its divisors is an integer number (40110509259).

Almost surely, 2^80221018517 is an apocalyptic number.

It is an amenable number.

80221018517 is a deficient number, since it is larger than the sum of its proper divisors (1).

80221018517 is an equidigital number, since it uses as much as digits as its factorization.

80221018517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8960, while the sum is 35.

The spelling of 80221018517 in words is "eighty billion, two hundred twenty-one million, eighteen thousand, five hundred seventeen".