11759016721 has 3 divisors (see below), whose sum is σ = 11759125161. Its totient is φ = 11758908282.

The previous prime is 11759016697. The next prime is 11759016757. The reversal of 11759016721 is 12761095711.

The square root of 11759016721 is 108439.

It is a perfect power (a square), and thus also a powerful number.

11759016721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 11759016721 - 2¹⁹ = 11758492433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11759016781) 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 2 ways as a sum of consecutive naturals, for example, 54220 + ... + 162658.

It is an arithmetic number, because the mean of its divisors is an integer number (3919708387).

Almost surely, 2^11759016721 is an apocalyptic number.

11759016721 is the 108439-th square number.

11759016721 is the 54220-th centered octagonal number.

It is an amenable number.

11759016721 is a deficient number, since it is larger than the sum of its proper divisors (108440).

11759016721 is an frugal number, since it uses more digits than its factorization.

11759016721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216878 (or 108439 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 40.

The spelling of 11759016721 in words is "eleven billion, seven hundred fifty-nine million, sixteen thousand, seven hundred twenty-one".