11051111680 has 144 divisors (see below), whose sum is σ = 30316608000. Its totient is φ = 3780919296.

The previous prime is 11051111657. The next prime is 11051111711. The reversal of 11051111680 is 8611115011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5527321 + ... + 5529319.

It is an arithmetic number, because the mean of its divisors is an integer number (210532000).

Almost surely, 2^11051111680 is an apocalyptic number.

11051111680 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 11051111680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15158304000).

11051111680 is an abundant number, since it is smaller than the sum of its proper divisors (19265496320).

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

11051111680 is an equidigital number, since it uses as much as digits as its factorization.

11051111680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2644 (or 2630 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 25.

Adding to 11051111680 its reverse (8611115011), we get a palindrome (19662226691).

The spelling of 11051111680 in words is "eleven billion, fifty-one million, one hundred eleven thousand, six hundred eighty".