91533908611 has 4 divisors (see below), whose sum is σ = 95513643792. Its totient is φ = 87554173432.

The previous prime is 91533908593. The next prime is 91533908659. The reversal of 91533908611 is 11680933519.

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

It is a cyclic number.

It is not a de Polignac number, because 91533908611 - 2⁷ = 91533908483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91533900611) 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, 1989867556 + ... + 1989867601.

It is an arithmetic number, because the mean of its divisors is an integer number (23878410948).

Almost surely, 2^91533908611 is an apocalyptic number.

91533908611 is a deficient number, since it is larger than the sum of its proper divisors (3979735181).

91533908611 is a wasteful number, since it uses less digits than its factorization.

91533908611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3979735180.

The product of its (nonzero) digits is 174960, while the sum is 46.

The spelling of 91533908611 in words is "ninety-one billion, five hundred thirty-three million, nine hundred eight thousand, six hundred eleven".