80568581069 has 2 divisors, whose sum is σ = 80568581070. Its totient is φ = 80568581068.

The previous prime is 80568581059. The next prime is 80568581087. The reversal of 80568581069 is 96018586508.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45313636900 + 35254944169 = 212870^2 + 187763^2 .

It is a cyclic number.

It is not a de Polignac number, because 80568581069 - 2⁴ = 80568581053 is a prime.

It is a super-2 number, since 2×80568581069² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80568581059) 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, 40284290534 + 40284290535.

It is an arithmetic number, because the mean of its divisors is an integer number (40284290535).

Almost surely, 2^80568581069 is an apocalyptic number.

It is an amenable number.

80568581069 is a deficient number, since it is larger than the sum of its proper divisors (1).

80568581069 is an equidigital number, since it uses as much as digits as its factorization.

80568581069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4147200, while the sum is 56.

The spelling of 80568581069 in words is "eighty billion, five hundred sixty-eight million, five hundred eighty-one thousand, sixty-nine".