11550000000 has 576 divisors, whose sum is σ = 47812475520. Its totient is φ = 2400000000.

The previous prime is 11549999983. The next prime is 11550000001. The reversal of 11550000000 is 5511.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11550000001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1049999995 + ... + 1050000005.

It is an arithmetic number, because the mean of its divisors is an integer number (83007770).

Almost surely, 2^11550000000 is an apocalyptic number.

11550000000 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 11550000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23906237760).

11550000000 is an abundant number, since it is smaller than the sum of its proper divisors (36262475520).

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

11550000000 is an frugal number, since it uses more digits than its factorization.

11550000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75 (or 28 counting only the distinct ones).

The product of its (nonzero) digits is 25, while the sum is 12.

Adding to 11550000000 its reverse (5511), we get a palindrome (11550005511).

The spelling of 11550000000 in words is "eleven billion, five hundred fifty million", and thus it is an aban number.