11091117890888 has 96 divisors (see below), whose sum is σ = 25626935520000. Its totient is φ = 4471484871168.

The previous prime is 11091117890833. The next prime is 11091117890903. The reversal of 11091117890888 is 88809871119011.

It is a Cunningham number, because it is equal to 3330333²-1.

It is a self number, because there is not a number n which added to its sum of digits gives 11091117890888.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12905045 + ... + 13737627.

It is an arithmetic number, because the mean of its divisors is an integer number (266947245000).

Almost surely, 2^{11091117890888} 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 11091117890888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12813467760000).

11091117890888 is an abundant number, since it is smaller than the sum of its proper divisors (14535817629112).

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

11091117890888 is a wasteful number, since it uses less digits than its factorization.

11091117890888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834619 (or 834608 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 62.

The spelling of 11091117890888 in words is "eleven trillion, ninety-one billion, one hundred seventeen million, eight hundred ninety thousand, eight hundred eighty-eight".