80449481677 has 2 divisors, whose sum is σ = 80449481678. Its totient is φ = 80449481676.

The previous prime is 80449481669. The next prime is 80449481713. The reversal of 80449481677 is 77618494408.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80258323401 + 191158276 = 283299^2 + 13826^2 .

It is a cyclic number.

It is not a de Polignac number, because 80449481677 - 2³ = 80449481669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80449481977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40224740838 + 40224740839.

It is an arithmetic number, because the mean of its divisors is an integer number (40224740839).

Almost surely, 2^80449481677 is an apocalyptic number.

It is an amenable number.

80449481677 is a deficient number, since it is larger than the sum of its proper divisors (1).

80449481677 is an equidigital number, since it uses as much as digits as its factorization.

80449481677 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10838016, while the sum is 58.

The spelling of 80449481677 in words is "eighty billion, four hundred forty-nine million, four hundred eighty-one thousand, six hundred seventy-seven".