16433321075777 has 2 divisors, whose sum is σ = 16433321075778. Its totient is φ = 16433321075776.

The previous prime is 16433321075671. The next prime is 16433321075779. The reversal of 16433321075777 is 77757012333461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16394854491136 + 38466584641 = 4049056^2 + 196129^2 .

It is a cyclic number.

It is not a de Polignac number, because 16433321075777 - 2¹⁶ = 16433321010241 is a prime.

Together with 16433321075779, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16433321075779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8216660537888 + 8216660537889.

It is an arithmetic number, because the mean of its divisors is an integer number (8216660537889).

Almost surely, 2^{16433321075777} is an apocalyptic number.

It is an amenable number.

16433321075777 is a deficient number, since it is larger than the sum of its proper divisors (1).

16433321075777 is an equidigital number, since it uses as much as digits as its factorization.

16433321075777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15558480, while the sum is 56.

The spelling of 16433321075777 in words is "sixteen trillion, four hundred thirty-three billion, three hundred twenty-one million, seventy-five thousand, seven hundred seventy-seven".