91540660120 has 256 divisors, whose sum is σ = 275453337600. Its totient is φ = 26560327680.

The previous prime is 91540660111. The next prime is 91540660163. The reversal of 91540660120 is 2106604519.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2122612 + ... + 2165308.

It is an arithmetic number, because the mean of its divisors is an integer number (1075989600).

Almost surely, 2^91540660120 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 91540660120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137726668800).

91540660120 is an abundant number, since it is smaller than the sum of its proper divisors (183912677480).

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

91540660120 is a wasteful number, since it uses less digits than its factorization.

91540660120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42778 (or 42774 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The spelling of 91540660120 in words is "ninety-one billion, five hundred forty million, six hundred sixty thousand, one hundred twenty".