11561244112 has 120 divisors (see below), whose sum is σ = 25194498560. Its totient is φ = 5134060800.

The previous prime is 11561244073. The next prime is 11561244131. The reversal of 11561244112 is 21144216511.

11561244112 = 7089² + 7090² + ... + 7311².

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26335189 + ... + 26335627.

Almost surely, 2^11561244112 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 11561244112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12597249280).

11561244112 is an abundant number, since it is smaller than the sum of its proper divisors (13633254448).

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

11561244112 is a wasteful number, since it uses less digits than its factorization.

11561244112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 753 (or 736 counting only the distinct ones).

The product of its digits is 1920, while the sum is 28.

The spelling of 11561244112 in words is "eleven billion, five hundred sixty-one million, two hundred forty-four thousand, one hundred twelve".