80799000257 has 2 divisors, whose sum is σ = 80799000258. Its totient is φ = 80799000256.

The previous prime is 80799000193. The next prime is 80799000287. The reversal of 80799000257 is 75200099708.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45011441281 + 35787558976 = 212159^2 + 189176^2 .

It is a cyclic number.

It is not a de Polignac number, because 80799000257 - 2⁶ = 80799000193 is a prime.

It is not a weakly prime, because it can be changed into another prime (80799000287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40399500128 + 40399500129.

It is an arithmetic number, because the mean of its divisors is an integer number (40399500129).

Almost surely, 2^80799000257 is an apocalyptic number.

It is an amenable number.

80799000257 is a deficient number, since it is larger than the sum of its proper divisors (1).

80799000257 is an equidigital number, since it uses as much as digits as its factorization.

80799000257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 317520, while the sum is 47.

The spelling of 80799000257 in words is "eighty billion, seven hundred ninety-nine million, two hundred fifty-seven", and thus it is an aban number.