11321533648 has 80 divisors (see below), whose sum is σ = 23939092800. Its totient is φ = 5166443520.

The previous prime is 11321533637. The next prime is 11321533703. The reversal of 11321533648 is 84633512311.

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, 4962268 + ... + 4964548.

It is an arithmetic number, because the mean of its divisors is an integer number (299238660).

Almost surely, 2^11321533648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11321533648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11969546400).

11321533648 is an abundant number, since it is smaller than the sum of its proper divisors (12617559152).

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

11321533648 is a wasteful number, since it uses less digits than its factorization.

11321533648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2900 (or 2894 counting only the distinct ones).

The product of its digits is 51840, while the sum is 37.

The spelling of 11321533648 in words is "eleven billion, three hundred twenty-one million, five hundred thirty-three thousand, six hundred forty-eight".