11056561984 has 56 divisors (see below), whose sum is σ = 23800798728. Its totient is φ = 5065728000.

The previous prime is 11056561979. The next prime is 11056562029. The reversal of 11056561984 is 48916565011.

It can be written as a sum of positive squares in 4 ways, for example, as 1477633600 + 9578928384 = 38440^2 + 97872^2 .

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, 65484 + ... + 162484.

It is an arithmetic number, because the mean of its divisors is an integer number (425014263).

Almost surely, 2^11056561984 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 11056561984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11900399364).

11056561984 is an abundant number, since it is smaller than the sum of its proper divisors (12744236744).

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

11056561984 is a wasteful number, since it uses less digits than its factorization.

11056561984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97163 (or 97153 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 46.

The spelling of 11056561984 in words is "eleven billion, fifty-six million, five hundred sixty-one thousand, nine hundred eighty-four".