11550553320000 has 280 divisors, whose sum is σ = 38198897440000. Its totient is φ = 3079335168000.

The previous prime is 11550553319947. The next prime is 11550553320049. The reversal of 11550553320000 is 2335505511.

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

It is a self number, because there is not a number n which added to its sum of digits gives 11550553320000.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 556669626 + ... + 556690374.

Almost surely, 2^{11550553320000} is an apocalyptic number.

11550553320000 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 11550553320000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19099448720000).

11550553320000 is an abundant number, since it is smaller than the sum of its proper divisors (26648344120000).

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

11550553320000 is an equidigital number, since it uses as much as digits as its factorization.

11550553320000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25423 (or 25398 counting only the distinct ones).

The product of its (nonzero) digits is 11250, while the sum is 30.

Adding to 11550553320000 its reverse (2335505511), we get a palindrome (11552888825511).

The spelling of 11550553320000 in words is "eleven trillion, five hundred fifty billion, five hundred fifty-three million, three hundred twenty thousand".