91808317017 has 12 divisors (see below), whose sum is σ = 132661401600. Its totient is φ = 61182750168.

The previous prime is 91808317001. The next prime is 91808317019. The reversal of 91808317017 is 71071380819.

It is a happy number.

It is not a de Polignac number, because 91808317017 - 2⁴ = 91808317001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91808317019) 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 in 11 ways as a sum of consecutive naturals, for example, 1874017 + ... + 1922382.

It is an arithmetic number, because the mean of its divisors is an integer number (11055116800).

Almost surely, 2^91808317017 is an apocalyptic number.

It is an amenable number.

91808317017 is a deficient number, since it is larger than the sum of its proper divisors (40853084583).

91808317017 is a wasteful number, since it uses less digits than its factorization.

91808317017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3799092 (or 3799089 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 45.

The spelling of 91808317017 in words is "ninety-one billion, eight hundred eight million, three hundred seventeen thousand, seventeen".