765280081939991 has 2 divisors, whose sum is σ = 765280081939992. Its totient is φ = 765280081939990.

The previous prime is 765280081939943. The next prime is 765280081940047. The reversal of 765280081939991 is 199939180082567.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 765280081939991 - 2¹⁸ = 765280081677847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (765280081939291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 382640040969995 + 382640040969996.

It is an arithmetic number, because the mean of its divisors is an integer number (382640040969996).

Almost surely, 2^{765280081939991} is an apocalyptic number.

765280081939991 is a deficient number, since it is larger than the sum of its proper divisors (1).

765280081939991 is an equidigital number, since it uses as much as digits as its factorization.

765280081939991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 529079040, while the sum is 77.

The spelling of 765280081939991 in words is "seven hundred sixty-five trillion, two hundred eighty billion, eighty-one million, nine hundred thirty-nine thousand, nine hundred ninety-one".