11961569224 has 64 divisors (see below), whose sum is σ = 24728716800. Its totient is φ = 5423936320.

The previous prime is 11961569183. The next prime is 11961569227. The reversal of 11961569224 is 42296516911.

It is not an unprimeable number, because it can be changed into a prime (11961569227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5418729 + ... + 5420935.

It is an arithmetic number, because the mean of its divisors is an integer number (386386200).

Almost surely, 2^11961569224 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 11961569224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12364358400).

11961569224 is an abundant number, since it is smaller than the sum of its proper divisors (12767147576).

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

11961569224 is a wasteful number, since it uses less digits than its factorization.

11961569224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2755 (or 2729 counting only the distinct ones).

The product of its digits is 233280, while the sum is 46.

It can be divided in two parts, 11961 and 569224, that added together give a palindrome (581185).

The spelling of 11961569224 in words is "eleven billion, nine hundred sixty-one million, five hundred sixty-nine thousand, two hundred twenty-four".