11111112345680 has 160 divisors (see below), whose sum is σ = 26289782703360. Its totient is φ = 4366388920320.

The previous prime is 11111112345677. The next prime is 11111112345701. The reversal of 11111112345680 is 8654321111111.

It is a self number, because there is not a number n which added to its sum of digits gives 11111112345680.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2028683102 + ... + 2028688578.

It is an arithmetic number, because the mean of its divisors is an integer number (164311141896).

Almost surely, 2^{11111112345680} is an apocalyptic number.

11111112345680 is a gapful number since it is divisible by the number (10) 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 11111112345680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13144891351680).

11111112345680 is an abundant number, since it is smaller than the sum of its proper divisors (15178670357680).

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

11111112345680 is a wasteful number, since it uses less digits than its factorization.

11111112345680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6757 (or 6751 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 35.

Adding to 11111112345680 its reverse (8654321111111), we get a palindrome (19765433456791).

The spelling of 11111112345680 in words is "eleven trillion, one hundred eleven billion, one hundred twelve million, three hundred forty-five thousand, six hundred eighty".