11721037544 has 32 divisors (see below), whose sum is σ = 22995083520. Its totient is φ = 5590406976.

The previous prime is 11721037541. The next prime is 11721037579. The reversal of 11721037544 is 44573012711.

11721037544 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×11721037544² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11721037541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19259 + ... + 154314.

It is an arithmetic number, because the mean of its divisors is an integer number (718596360).

Almost surely, 2^11721037544 is an apocalyptic number.

It is an amenable number.

11721037544 is a deficient number, since it is larger than the sum of its proper divisors (11274045976).

11721037544 is a wasteful number, since it uses less digits than its factorization.

11721037544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173969 (or 173965 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 35.

The spelling of 11721037544 in words is "eleven billion, seven hundred twenty-one million, thirty-seven thousand, five hundred forty-four".