91236586671 has 12 divisors (see below), whose sum is σ = 131871060048. Its totient is φ = 60785216064.

The previous prime is 91236586631. The next prime is 91236586681. The reversal of 91236586671 is 17668563219.

It is not a de Polignac number, because 91236586671 - 2⁹ = 91236586159 is a prime.

It is a super-2 number, since 2×91236586671² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91236586631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3249835 + ... + 3277788.

It is an arithmetic number, because the mean of its divisors is an integer number (10989255004).

Almost surely, 2^91236586671 is an apocalyptic number.

91236586671 is a deficient number, since it is larger than the sum of its proper divisors (40634473377).

91236586671 is a wasteful number, since it uses less digits than its factorization.

91236586671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6529182 (or 6529179 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The spelling of 91236586671 in words is "ninety-one billion, two hundred thirty-six million, five hundred eighty-six thousand, six hundred seventy-one".