11550311320 has 16 divisors (see below), whose sum is σ = 25988200560. Its totient is φ = 4620124512.

The previous prime is 11550311317. The next prime is 11550311321. The reversal of 11550311320 is 2311305511.

It is a junction number, because it is equal to n+sod(n) for n = 11550311291 and 11550311300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11550311321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144378852 + ... + 144378931.

It is an arithmetic number, because the mean of its divisors is an integer number (1624262535).

Almost surely, 2^11550311320 is an apocalyptic number.

11550311320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11550311320 is an abundant number, since it is smaller than the sum of its proper divisors (14437889240).

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

11550311320 is a wasteful number, since it uses less digits than its factorization.

11550311320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288757794 (or 288757790 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 22.

Adding to 11550311320 its reverse (2311305511), we get a palindrome (13861616831).

The spelling of 11550311320 in words is "eleven billion, five hundred fifty million, three hundred eleven thousand, three hundred twenty".