11421728305 has 16 divisors (see below), whose sum is σ = 15537251520. Its totient is φ = 7990584768.

The previous prime is 11421728303. The next prime is 11421728317. The reversal of 11421728305 is 50382712411.

11421728305 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 11421728305 - 2¹ = 11421728303 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11421728303) 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, 4622947 + ... + 4625416.

It is an arithmetic number, because the mean of its divisors is an integer number (971078220).

Almost surely, 2^11421728305 is an apocalyptic number.

It is an amenable number.

11421728305 is a deficient number, since it is larger than the sum of its proper divisors (4115523215).

11421728305 is a wasteful number, since it uses less digits than its factorization.

11421728305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9248400.

The product of its (nonzero) digits is 13440, while the sum is 34.

The spelling of 11421728305 in words is "eleven billion, four hundred twenty-one million, seven hundred twenty-eight thousand, three hundred five".