91678767459443 has 2 divisors, whose sum is σ = 91678767459444. Its totient is φ = 91678767459442.

The previous prime is 91678767459319. The next prime is 91678767459481. The reversal of 91678767459443 is 34495476787619.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91678767459443 - 2¹⁶ = 91678767393907 is a prime.

It is not a weakly prime, because it can be changed into another prime (91678767459493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45839383729721 + 45839383729722.

It is an arithmetic number, because the mean of its divisors is an integer number (45839383729722).

Almost surely, 2^{91678767459443} is an apocalyptic number.

91678767459443 is a deficient number, since it is larger than the sum of its proper divisors (1).

91678767459443 is an equidigital number, since it uses as much as digits as its factorization.

91678767459443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7681443840, while the sum is 80.

The spelling of 91678767459443 in words is "ninety-one trillion, six hundred seventy-eight billion, seven hundred sixty-seven million, four hundred fifty-nine thousand, four hundred forty-three".