80786367517 has 2 divisors, whose sum is σ = 80786367518. Its totient is φ = 80786367516.

The previous prime is 80786367499. The next prime is 80786367523. The reversal of 80786367517 is 71576368708.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78612383641 + 2173983876 = 280379^2 + 46626^2 .

It is a cyclic number.

It is not a de Polignac number, because 80786367517 - 2¹¹ = 80786365469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80786367527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40393183758 + 40393183759.

It is an arithmetic number, because the mean of its divisors is an integer number (40393183759).

Almost surely, 2^80786367517 is an apocalyptic number.

It is an amenable number.

80786367517 is a deficient number, since it is larger than the sum of its proper divisors (1).

80786367517 is an equidigital number, since it uses as much as digits as its factorization.

80786367517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11854080, while the sum is 58.

The spelling of 80786367517 in words is "eighty billion, seven hundred eighty-six million, three hundred sixty-seven thousand, five hundred seventeen".