91911828017 has 4 divisors (see below), whose sum is σ = 92725207140. Its totient is φ = 91098448896.

The previous prime is 91911828007. The next prime is 91911828079. The reversal of 91911828017 is 71082811919.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 42133309696 + 49778518321 = 205264^2 + 223111^2 .

It is a cyclic number.

It is not a de Polignac number, because 91911828017 - 2¹⁸ = 91911565873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91911828007) 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 3 ways as a sum of consecutive naturals, for example, 406689392 + ... + 406689617.

It is an arithmetic number, because the mean of its divisors is an integer number (23181301785).

Almost surely, 2^91911828017 is an apocalyptic number.

It is an amenable number.

91911828017 is a deficient number, since it is larger than the sum of its proper divisors (813379123).

91911828017 is a wasteful number, since it uses less digits than its factorization.

91911828017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 813379122.

The product of its (nonzero) digits is 72576, while the sum is 47.

The spelling of 91911828017 in words is "ninety-one billion, nine hundred eleven million, eight hundred twenty-eight thousand, seventeen".