11717111280 has 960 divisors, whose sum is σ = 48365475840. Its totient is φ = 2326560768.

The previous prime is 11717111269. The next prime is 11717111299. The reversal of 11717111280 is 8211171711.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 249300217 + ... + 249300263.

It is an arithmetic number, because the mean of its divisors is an integer number (50380704).

Almost surely, 2^11717111280 is an apocalyptic number.

11717111280 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 11717111280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24182737920).

11717111280 is an abundant number, since it is smaller than the sum of its proper divisors (36648364560).

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

11717111280 is a wasteful number, since it uses less digits than its factorization.

11717111280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166 (or 153 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 30.

Adding to 11717111280 its reverse (8211171711), we get a palindrome (19928282991).

The spelling of 11717111280 in words is "eleven billion, seven hundred seventeen million, one hundred eleven thousand, two hundred eighty".