80021702005489 has 2 divisors, whose sum is σ = 80021702005490. Its totient is φ = 80021702005488.

The previous prime is 80021702005471. The next prime is 80021702005499. The reversal of 80021702005489 is 98450020712008.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72832825666225 + 7188876339264 = 8534215^2 + 2681208^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80021702005489 is a prime.

It is a super-2 number, since 2×80021702005489² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (80021702005439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40010851002744 + 40010851002745.

It is an arithmetic number, because the mean of its divisors is an integer number (40010851002745).

Almost surely, 2^{80021702005489} is an apocalyptic number.

It is an amenable number.

80021702005489 is a deficient number, since it is larger than the sum of its proper divisors (1).

80021702005489 is an equidigital number, since it uses as much as digits as its factorization.

80021702005489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 322560, while the sum is 46.

The spelling of 80021702005489 in words is "eighty trillion, twenty-one billion, seven hundred two million, five thousand, four hundred eighty-nine".