11721913413 has 16 divisors (see below), whose sum is σ = 17904606720. Its totient is φ = 6682244976.

The previous prime is 11721913397. The next prime is 11721913417. The reversal of 11721913413 is 31431912711.

11721913413 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11721913413 - 2⁴ = 11721913397 is a prime.

It is a super-3 number, since 3×11721913413³ (a number of 31 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11721913417) 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 15 ways as a sum of consecutive naturals, for example, 657295 + ... + 674892.

It is an arithmetic number, because the mean of its divisors is an integer number (1119037920).

Almost surely, 2^11721913413 is an apocalyptic number.

It is an amenable number.

11721913413 is a deficient number, since it is larger than the sum of its proper divisors (6182693307).

11721913413 is a wasteful number, since it uses less digits than its factorization.

11721913413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332616.

The product of its digits is 4536, while the sum is 33.

The spelling of 11721913413 in words is "eleven billion, seven hundred twenty-one million, nine hundred thirteen thousand, four hundred thirteen".