11556008856 has 448 divisors, whose sum is σ = 39473913600. Its totient is φ = 3100011264.

The previous prime is 11556008833. The next prime is 11556008869. The reversal of 11556008856 is 65880065511.

11556008856 is a `hidden beast` number, since 1 + 1 + 5 + 560 + 0 + 8 + 85 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 50907415 + ... + 50907641.

Almost surely, 2^11556008856 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 11556008856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19736956800).

11556008856 is an abundant number, since it is smaller than the sum of its proper divisors (27917904744).

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

11556008856 is a wasteful number, since it uses less digits than its factorization.

11556008856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330 (or 311 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 45.

The spelling of 11556008856 in words is "eleven billion, five hundred fifty-six million, eight thousand, eight hundred fifty-six".