11742544721 has 8 divisors (see below), whose sum is σ = 11989047840. Its totient is φ = 11498356512.

The previous prime is 11742544703. The next prime is 11742544741. The reversal of 11742544721 is 12744524711.

11742544721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11742544721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11742544741) 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, 568475 + ... + 588768.

It is an arithmetic number, because the mean of its divisors is an integer number (1498630980).

Almost surely, 2^11742544721 is an apocalyptic number.

It is an amenable number.

11742544721 is a deficient number, since it is larger than the sum of its proper divisors (246503119).

11742544721 is a wasteful number, since it uses less digits than its factorization.

11742544721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157455.

The product of its digits is 62720, while the sum is 38.

The spelling of 11742544721 in words is "eleven billion, seven hundred forty-two million, five hundred forty-four thousand, seven hundred twenty-one".