11261223644 has 24 divisors (see below), whose sum is σ = 21676385136. Its totient is φ = 5118735600.

The previous prime is 11261223643. The next prime is 11261223661. The reversal of 11261223644 is 44632216211.

It is a self number, because there is not a number n which added to its sum of digits gives 11261223644.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11261223643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1052267 + ... + 1062914.

It is an arithmetic number, because the mean of its divisors is an integer number (903182714).

Almost surely, 2^11261223644 is an apocalyptic number.

It is an amenable number.

11261223644 is a deficient number, since it is larger than the sum of its proper divisors (10415161492).

11261223644 is a wasteful number, since it uses less digits than its factorization.

11261223644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2115218 (or 2115194 counting only the distinct ones).

The product of its digits is 13824, while the sum is 32.

Adding to 11261223644 its reverse (44632216211), we get a palindrome (55893439855).

The spelling of 11261223644 in words is "eleven billion, two hundred sixty-one million, two hundred twenty-three thousand, six hundred forty-four".