91108127712 has 192 divisors, whose sum is σ = 289118592000. Its totient is φ = 24557727744.

The previous prime is 91108127711. The next prime is 91108127749. The reversal of 91108127712 is 21772180119.

It is a super-2 number, since 2×91108127712² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91108127711) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1087914 + ... + 1168662.

It is an arithmetic number, because the mean of its divisors is an integer number (1505826000).

Almost surely, 2^91108127712 is an apocalyptic number.

91108127712 is a gapful number since it is divisible by the number (92) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91108127712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144559296000).

91108127712 is an abundant number, since it is smaller than the sum of its proper divisors (198010464288).

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

91108127712 is a wasteful number, since it uses less digits than its factorization.

91108127712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80865 (or 80857 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 39.

The spelling of 91108127712 in words is "ninety-one billion, one hundred eight million, one hundred twenty-seven thousand, seven hundred twelve".