11115655656 has 128 divisors (see below), whose sum is σ = 32527630080. Its totient is φ = 3099672576.

The previous prime is 11115655651. The next prime is 11115655667. The reversal of 11115655656 is 65655651111.

11115655656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (11115655651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1750920 + ... + 1757256.

It is an arithmetic number, because the mean of its divisors is an integer number (254122110).

Almost surely, 2^11115655656 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 11115655656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16263815040).

11115655656 is an abundant number, since it is smaller than the sum of its proper divisors (21411974424).

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

11115655656 is a wasteful number, since it uses less digits than its factorization.

11115655656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6603 (or 6599 counting only the distinct ones).

The product of its digits is 135000, while the sum is 42.

The spelling of 11115655656 in words is "eleven billion, one hundred fifteen million, six hundred fifty-five thousand, six hundred fifty-six".