8000050000081 has 2 divisors, whose sum is σ = 8000050000082. Its totient is φ = 8000050000080.

The previous prime is 8000050000067. The next prime is 8000050000099. The reversal of 8000050000081 is 1800000500008.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7927518892225 + 72531107856 = 2815585^2 + 269316^2 .

It is a cyclic number.

It is not a de Polignac number, because 8000050000081 - 2²⁵ = 8000016445649 is a prime.

It is a super-2 number, since 2×8000050000081² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8000050003081) 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, 4000025000040 + 4000025000041.

It is an arithmetic number, because the mean of its divisors is an integer number (4000025000041).

Almost surely, 2^{8000050000081} is an apocalyptic number.

It is an amenable number.

8000050000081 is a deficient number, since it is larger than the sum of its proper divisors (1).

8000050000081 is an equidigital number, since it uses as much as digits as its factorization.

8000050000081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 320, while the sum is 22.

Adding to 8000050000081 its reverse (1800000500008), we get a palindrome (9800050500089).

The spelling of 8000050000081 in words is "eight trillion, fifty million, eighty-one", and thus it is an aban number and an uban number.