80028064121581 has 2 divisors, whose sum is σ = 80028064121582. Its totient is φ = 80028064121580.

The previous prime is 80028064121573. The next prime is 80028064121597. The reversal of 80028064121581 is 18512146082008.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77719211222500 + 2308852899081 = 8815850^2 + 1519491^2 .

It is a cyclic number.

It is not a de Polignac number, because 80028064121581 - 2³ = 80028064121573 is a prime.

It is a super-2 number, since 2×80028064121581² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80028064121501) 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, 40014032060790 + 40014032060791.

It is an arithmetic number, because the mean of its divisors is an integer number (40014032060791).

Almost surely, 2^{80028064121581} is an apocalyptic number.

It is an amenable number.

80028064121581 is a deficient number, since it is larger than the sum of its proper divisors (1).

80028064121581 is an equidigital number, since it uses as much as digits as its factorization.

80028064121581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 245760, while the sum is 46.

The spelling of 80028064121581 in words is "eighty trillion, twenty-eight billion, sixty-four million, one hundred twenty-one thousand, five hundred eighty-one".