11728673673921 has 12 divisors (see below), whose sum is σ = 17228560199760. Its totient is φ = 7686588396120.

The previous prime is 11728673673917. The next prime is 11728673674043. The reversal of 11728673673921 is 12937637682711.

11728673673921 is a `hidden beast` number, since 1 + 172 + 8 + 6 + 73 + 6 + 7 + 392 + 1 = 666.

11728673673921 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 11728673673921 - 2² = 11728673673917 is a prime.

It is a super-2 number, since 2×11728673673921² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11728671673921) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11043948315 + ... + 11043949376.

It is an arithmetic number, because the mean of its divisors is an integer number (1435713349980).

Almost surely, 2^{11728673673921} is an apocalyptic number.

It is an amenable number.

11728673673921 is a deficient number, since it is larger than the sum of its proper divisors (5499886525839).

11728673673921 is a wasteful number, since it uses less digits than its factorization.

11728673673921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22087897756 (or 22087897753 counting only the distinct ones).

The product of its digits is 32006016, while the sum is 63.

The spelling of 11728673673921 in words is "eleven trillion, seven hundred twenty-eight billion, six hundred seventy-three million, six hundred seventy-three thousand, nine hundred twenty-one".