11561568 has 48 divisors (see below), whose sum is σ = 30735936. Its totient is φ = 3804800.

The previous prime is 11561531. The next prime is 11561591. The reversal of 11561568 is 86516511.

It is a tau number, because it is divible by the number of its divisors (48).

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, 7243 + ... + 8693.

It is an arithmetic number, because the mean of its divisors is an integer number (640332).

Almost surely, 2^11561568 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 11561568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15367968).

11561568 is an abundant number, since it is smaller than the sum of its proper divisors (19174368).

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

11561568 is a wasteful number, since it uses less digits than its factorization.

11561568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1547 (or 1539 counting only the distinct ones).

The product of its digits is 7200, while the sum is 33.

The square root of 11561568 is about 3400.2305804166. The cubic root of 11561568 is about 226.1199665891.

The spelling of 11561568 in words is "eleven million, five hundred sixty-one thousand, five hundred sixty-eight".