80505887094377 has 2 divisors, whose sum is σ = 80505887094378. Its totient is φ = 80505887094376.

The previous prime is 80505887094341. The next prime is 80505887094383. The reversal of 80505887094377 is 77349078850508.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69743393265001 + 10762493829376 = 8351251^2 + 3280624^2 .

It is a cyclic number.

It is not a de Polignac number, because 80505887094377 - 2¹⁰ = 80505887093353 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80505887094377.

It is not a weakly prime, because it can be changed into another prime (80505887094307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40252943547188 + 40252943547189.

It is an arithmetic number, because the mean of its divisors is an integer number (40252943547189).

Almost surely, 2^{80505887094377} is an apocalyptic number.

It is an amenable number.

80505887094377 is a deficient number, since it is larger than the sum of its proper divisors (1).

80505887094377 is an equidigital number, since it uses as much as digits as its factorization.

80505887094377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 474163200, while the sum is 71.

The spelling of 80505887094377 in words is "eighty trillion, five hundred five billion, eight hundred eighty-seven million, ninety-four thousand, three hundred seventy-seven".