91539141440 has 112 divisors (see below), whose sum is σ = 219486723840. Its totient is φ = 36363048960.

The previous prime is 91539141437. The next prime is 91539141559. The reversal of 91539141440 is 4414193519.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32196659 + ... + 32199501.

Almost surely, 2^91539141440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91539141440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109743361920).

91539141440 is an abundant number, since it is smaller than the sum of its proper divisors (127947582400).

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

91539141440 is a wasteful number, since it uses less digits than its factorization.

91539141440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3520 (or 3510 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 41.

The spelling of 91539141440 in words is "ninety-one billion, five hundred thirty-nine million, one hundred forty-one thousand, four hundred forty".