80800844869 has 2 divisors, whose sum is σ = 80800844870. Its totient is φ = 80800844868.

The previous prime is 80800844867. The next prime is 80800844941. The reversal of 80800844869 is 96844800808.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51649380225 + 29151464644 = 227265^2 + 170738^2 .

It is a cyclic number.

It is not a de Polignac number, because 80800844869 - 2¹ = 80800844867 is a prime.

It is a super-2 number, since 2×80800844869² (a number of 23 digits) contains 22 as substring.

Together with 80800844867, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80800844867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40400422434 + 40400422435.

It is an arithmetic number, because the mean of its divisors is an integer number (40400422435).

Almost surely, 2^80800844869 is an apocalyptic number.

It is an amenable number.

80800844869 is a deficient number, since it is larger than the sum of its proper divisors (1).

80800844869 is an equidigital number, since it uses as much as digits as its factorization.

80800844869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3538944, while the sum is 55.

The spelling of 80800844869 in words is "eighty billion, eight hundred million, eight hundred forty-four thousand, eight hundred sixty-nine".