11521540016 has 80 divisors (see below), whose sum is σ = 27100390464. Its totient is φ = 4632256512.

The previous prime is 11521539973. The next prime is 11521540027. The reversal of 11521540016 is 61004512511.

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, 586286 + ... + 605618.

Almost surely, 2^11521540016 is an apocalyptic number.

11521540016 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 11521540016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13550195232).

11521540016 is an abundant number, since it is smaller than the sum of its proper divisors (15578850448).

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

11521540016 is a wasteful number, since it uses less digits than its factorization.

11521540016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19678 (or 19672 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 26.

The spelling of 11521540016 in words is "eleven billion, five hundred twenty-one million, five hundred forty thousand, sixteen".