11728946857 has 2 divisors, whose sum is σ = 11728946858. Its totient is φ = 11728946856.

The previous prime is 11728946851. The next prime is 11728946893. The reversal of 11728946857 is 75864982711.

11728946857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11530249641 + 198697216 = 107379^2 + 14096^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11728946857 is a prime.

It is not a weakly prime, because it can be changed into another prime (11728946851) 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 as a sum of consecutive naturals, namely, 5864473428 + 5864473429.

It is an arithmetic number, because the mean of its divisors is an integer number (5864473429).

Almost surely, 2^11728946857 is an apocalyptic number.

It is an amenable number.

11728946857 is a deficient number, since it is larger than the sum of its proper divisors (1).

11728946857 is an equidigital number, since it uses as much as digits as its factorization.

11728946857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6773760, while the sum is 58.

The spelling of 11728946857 in words is "eleven billion, seven hundred twenty-eight million, nine hundred forty-six thousand, eight hundred fifty-seven".