16533343665457 has 2 divisors, whose sum is σ = 16533343665458. Its totient is φ = 16533343665456.

The previous prime is 16533343665451. The next prime is 16533343665541. The reversal of 16533343665457 is 75456634333561.

It is a happy number.

16533343665457 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., 12120974547361 + 4412369118096 = 3481519^2 + 2100564^2 .

It is a cyclic number.

It is not a de Polignac number, because 16533343665457 - 2¹⁹ = 16533343141169 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16533343665395 and 16533343665404.

It is not a weakly prime, because it can be changed into another prime (16533343665451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8266671832728 + 8266671832729.

It is an arithmetic number, because the mean of its divisors is an integer number (8266671832729).

Almost surely, 2^{16533343665457} is an apocalyptic number.

It is an amenable number.

16533343665457 is a deficient number, since it is larger than the sum of its proper divisors (1).

16533343665457 is an equidigital number, since it uses as much as digits as its factorization.

16533343665457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944000, while the sum is 61.

The spelling of 16533343665457 in words is "sixteen trillion, five hundred thirty-three billion, three hundred forty-three million, six hundred sixty-five thousand, four hundred fifty-seven".