91806937832 has 16 divisors (see below), whose sum is σ = 172406564100. Its totient is φ = 45831854080.

The previous prime is 91806937799. The next prime is 91806937837. The reversal of 91806937832 is 23873960819.

It can be written as a sum of positive squares in 2 ways, for example, as 72073993156 + 19732944676 = 268466^2 + 140474^2 .

It is not an unprimeable number, because it can be changed into a prime (91806937837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8946407 + ... + 8956662.

Almost surely, 2^91806937832 is an apocalyptic number.

It is an amenable number.

91806937832 is a deficient number, since it is larger than the sum of its proper divisors (80599626268).

91806937832 is a wasteful number, since it uses less digits than its factorization.

91806937832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17903716 (or 17903712 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 56.

The spelling of 91806937832 in words is "ninety-one billion, eight hundred six million, nine hundred thirty-seven thousand, eight hundred thirty-two".