91545552317 has 2 divisors, whose sum is σ = 91545552318. Its totient is φ = 91545552316.

The previous prime is 91545552289. The next prime is 91545552337. The reversal of 91545552317 is 71325554519.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55819260121 + 35726292196 = 236261^2 + 189014^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91545552317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91545552337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45772776158 + 45772776159.

It is an arithmetic number, because the mean of its divisors is an integer number (45772776159).

Almost surely, 2^91545552317 is an apocalyptic number.

It is an amenable number.

91545552317 is a deficient number, since it is larger than the sum of its proper divisors (1).

91545552317 is an equidigital number, since it uses as much as digits as its factorization.

91545552317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 945000, while the sum is 47.

The spelling of 91545552317 in words is "ninety-one billion, five hundred forty-five million, five hundred fifty-two thousand, three hundred seventeen".