11284729681 has 4 divisors (see below), whose sum is σ = 11317064500. Its totient is φ = 11252394864.

The previous prime is 11284729649. The next prime is 11284729711. The reversal of 11284729681 is 18692748211.

11284729681 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.

It can be written as a sum of positive squares in 2 ways, for example, as 6559542081 + 4725187600 = 80991^2 + 68740^2 .

It is a cyclic number.

It is not a de Polignac number, because 11284729681 - 2⁵ = 11284729649 is a prime.

It is a super-2 number, since 2×11284729681² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11287729681) 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 3 ways as a sum of consecutive naturals, for example, 16166886 + ... + 16167583.

It is an arithmetic number, because the mean of its divisors is an integer number (2829266125).

Almost surely, 2^11284729681 is an apocalyptic number.

It is an amenable number.

11284729681 is a deficient number, since it is larger than the sum of its proper divisors (32334819).

11284729681 is an equidigital number, since it uses as much as digits as its factorization.

11284729681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32334818.

The product of its digits is 387072, while the sum is 49.

The spelling of 11284729681 in words is "eleven billion, two hundred eighty-four million, seven hundred twenty-nine thousand, six hundred eighty-one".