16728889477 has 2 divisors, whose sum is σ = 16728889478. Its totient is φ = 16728889476.

The previous prime is 16728889433. The next prime is 16728889481. The reversal of 16728889477 is 77498882761.

16728889477 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13014474561 + 3714414916 = 114081^2 + 60946^2 .

It is a cyclic number.

It is not a de Polignac number, because 16728889477 - 2²³ = 16720500869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16728880477) 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, 8364444738 + 8364444739.

It is an arithmetic number, because the mean of its divisors is an integer number (8364444739).

Almost surely, 2^16728889477 is an apocalyptic number.

It is an amenable number.

16728889477 is a deficient number, since it is larger than the sum of its proper divisors (1).

16728889477 is an equidigital number, since it uses as much as digits as its factorization.

16728889477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75866112, while the sum is 67.

The spelling of 16728889477 in words is "sixteen billion, seven hundred twenty-eight million, eight hundred eighty-nine thousand, four hundred seventy-seven".