11239561944 has 160 divisors (see below), whose sum is σ = 34333992000. Its totient is φ = 3414348288.

The previous prime is 11239561943. The next prime is 11239561969. The reversal of 11239561944 is 44916593211.

11239561944 is a `hidden beast` number, since 1 + 1 + 23 + 9 + 5 + 619 + 4 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 11239561944.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11239561943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 657052 + ... + 673940.

It is an arithmetic number, because the mean of its divisors is an integer number (214587450).

Almost surely, 2^11239561944 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 11239561944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17166996000).

11239561944 is an abundant number, since it is smaller than the sum of its proper divisors (23094430056).

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

11239561944 is a wasteful number, since it uses less digits than its factorization.

11239561944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16999 (or 16986 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The spelling of 11239561944 in words is "eleven billion, two hundred thirty-nine million, five hundred sixty-one thousand, nine hundred forty-four".