91636844467 has 48 divisors (see below), whose sum is σ = 114108305472. Its totient is φ = 73193809920.

The previous prime is 91636844443. The next prime is 91636844473. The reversal of 91636844467 is 76444863619.

It is not a de Polignac number, because 91636844467 - 2¹¹ = 91636842419 is a prime.

It is a super-2 number, since 2×91636844467² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91636844477) 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 47 ways as a sum of consecutive naturals, for example, 59005563 + ... + 59007115.

It is an arithmetic number, because the mean of its divisors is an integer number (2377256364).

Almost surely, 2^91636844467 is an apocalyptic number.

91636844467 is a deficient number, since it is larger than the sum of its proper divisors (22471461005).

91636844467 is a wasteful number, since it uses less digits than its factorization.

91636844467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2908 (or 2901 counting only the distinct ones).

The product of its digits is 20901888, while the sum is 58.

The spelling of 91636844467 in words is "ninety-one billion, six hundred thirty-six million, eight hundred forty-four thousand, four hundred sixty-seven".