11321529856 has 160 divisors (see below), whose sum is σ = 28493676288. Its totient is φ = 4373913600.

The previous prime is 11321529851. The next prime is 11321529893. The reversal of 11321529856 is 65892512311.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11321529851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2000631 + ... + 2006281.

Almost surely, 2^11321529856 is an apocalyptic number.

11321529856 is a gapful number since it is divisible by the number (16) 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 11321529856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14246838144).

11321529856 is an abundant number, since it is smaller than the sum of its proper divisors (17172146432).

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

11321529856 is an equidigital number, since it uses as much as digits as its factorization.

11321529856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5732 (or 5716 counting only the distinct ones).

The product of its digits is 129600, while the sum is 43.

The spelling of 11321529856 in words is "eleven billion, three hundred twenty-one million, five hundred twenty-nine thousand, eight hundred fifty-six".