91065582140 has 24 divisors (see below), whose sum is σ = 205948317120. Its totient is φ = 33624214848.

The previous prime is 91065582109. The next prime is 91065582161. The reversal of 91065582140 is 4128556019.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 175125860 + ... + 175126379.

It is an arithmetic number, because the mean of its divisors is an integer number (8581179880).

Almost surely, 2^91065582140 is an apocalyptic number.

It is an amenable number.

91065582140 is an abundant number, since it is smaller than the sum of its proper divisors (114882734980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91065582140 is a wasteful number, since it uses less digits than its factorization.

91065582140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350252261 (or 350252259 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 41.

The spelling of 91065582140 in words is "ninety-one billion, sixty-five million, five hundred eighty-two thousand, one hundred forty".