80869326829 has 2 divisors, whose sum is σ = 80869326830. Its totient is φ = 80869326828.

The previous prime is 80869326773. The next prime is 80869326869. The reversal of 80869326829 is 92862396808.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49371951204 + 31497375625 = 222198^2 + 177475^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80869326829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80869326869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40434663414 + 40434663415.

It is an arithmetic number, because the mean of its divisors is an integer number (40434663415).

Almost surely, 2^80869326829 is an apocalyptic number.

It is an amenable number.

80869326829 is a deficient number, since it is larger than the sum of its proper divisors (1).

80869326829 is an equidigital number, since it uses as much as digits as its factorization.

80869326829 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17915904, while the sum is 61.

The spelling of 80869326829 in words is "eighty billion, eight hundred sixty-nine million, three hundred twenty-six thousand, eight hundred twenty-nine".