11503211344 has 20 divisors (see below), whose sum is σ = 23460497440. Its totient is φ = 5448889440.

The previous prime is 11503211243. The next prime is 11503211407. The reversal of 11503211344 is 44311230511.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18919452 + ... + 18920059.

It is an arithmetic number, because the mean of its divisors is an integer number (1173024872).

Almost surely, 2^11503211344 is an apocalyptic number.

It is an amenable number.

11503211344 is an abundant number, since it is smaller than the sum of its proper divisors (11957286096).

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

11503211344 is a wasteful number, since it uses less digits than its factorization.

11503211344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37839538 (or 37839532 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 11503211344 its reverse (44311230511), we get a palindrome (55814441855).

The spelling of 11503211344 in words is "eleven billion, five hundred three million, two hundred eleven thousand, three hundred forty-four".