91068992868 has 192 divisors, whose sum is σ = 255054643200. Its totient is φ = 24751319040.

The previous prime is 91068992851. The next prime is 91068992873. The reversal of 91068992868 is 86829986019.

It is a super-2 number, since 2×91068992868² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 91068992799 and 91068992808.

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, 25804128 + ... + 25807656.

It is an arithmetic number, because the mean of its divisors is an integer number (1328409600).

Almost surely, 2^91068992868 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 91068992868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127527321600).

91068992868 is an abundant number, since it is smaller than the sum of its proper divisors (163985650332).

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

91068992868 is a wasteful number, since it uses less digits than its factorization.

91068992868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3770 (or 3768 counting only the distinct ones).

The product of its (nonzero) digits is 26873856, while the sum is 66.

The spelling of 91068992868 in words is "ninety-one billion, sixty-eight million, nine hundred ninety-two thousand, eight hundred sixty-eight".