11504721408 has 80 divisors (see below), whose sum is σ = 30852894336. Its totient is φ = 3809433600.

The previous prime is 11504721391. The next prime is 11504721443. The reversal of 11504721408 is 80412740511.

It is a super-2 number, since 2×11504721408² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 207135 + ... + 256737.

Almost surely, 2^11504721408 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 11504721408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15426447168).

11504721408 is an abundant number, since it is smaller than the sum of its proper divisors (19348172928).

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

11504721408 is an equidigital number, since it uses as much as digits as its factorization.

11504721408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49775 (or 49759 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 33.

The spelling of 11504721408 in words is "eleven billion, five hundred four million, seven hundred twenty-one thousand, four hundred eight".