80689912611871 has 2 divisors, whose sum is σ = 80689912611872. Its totient is φ = 80689912611870.

The previous prime is 80689912611859. The next prime is 80689912611901. The reversal of 80689912611871 is 17811621998608.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80689912611871 - 2⁵ = 80689912611839 is a prime.

It is a super-2 number, since 2×80689912611871² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 80689912611797 and 80689912611806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80689912611071) 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, 40344956305935 + 40344956305936.

It is an arithmetic number, because the mean of its divisors is an integer number (40344956305936).

Almost surely, 2^{80689912611871} is an apocalyptic number.

80689912611871 is a deficient number, since it is larger than the sum of its proper divisors (1).

80689912611871 is an equidigital number, since it uses as much as digits as its factorization.

80689912611871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20901888, while the sum is 67.

The spelling of 80689912611871 in words is "eighty trillion, six hundred eighty-nine billion, nine hundred twelve million, six hundred eleven thousand, eight hundred seventy-one".