16263216305321 has 2 divisors, whose sum is σ = 16263216305322. Its totient is φ = 16263216305320.

The previous prime is 16263216305263. The next prime is 16263216305377. The reversal of 16263216305321 is 12350361236261.

16263216305321 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., 10563728535721 + 5699487769600 = 3250189^2 + 2387360^2 .

It is a cyclic number.

It is not a de Polignac number, because 16263216305321 - 2¹⁰ = 16263216304297 is a prime.

It is not a weakly prime, because it can be changed into another prime (16263216305381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8131608152660 + 8131608152661.

It is an arithmetic number, because the mean of its divisors is an integer number (8131608152661).

Almost surely, 2^{16263216305321} is an apocalyptic number.

It is an amenable number.

16263216305321 is a deficient number, since it is larger than the sum of its proper divisors (1).

16263216305321 is an equidigital number, since it uses as much as digits as its factorization.

16263216305321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 41.

The spelling of 16263216305321 in words is "sixteen trillion, two hundred sixty-three billion, two hundred sixteen million, three hundred five thousand, three hundred twenty-one".