16505250533 has 2 divisors, whose sum is σ = 16505250534. Its totient is φ = 16505250532.

The previous prime is 16505250511. The next prime is 16505250551. The reversal of 16505250533 is 33505250561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11763137764 + 4742112769 = 108458^2 + 68863^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16505250533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16505250493 and 16505250502.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16505250563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8252625266 + 8252625267.

It is an arithmetic number, because the mean of its divisors is an integer number (8252625267).

Almost surely, 2^16505250533 is an apocalyptic number.

It is an amenable number.

16505250533 is a deficient number, since it is larger than the sum of its proper divisors (1).

16505250533 is an equidigital number, since it uses as much as digits as its factorization.

16505250533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 67500, while the sum is 35.

The spelling of 16505250533 in words is "sixteen billion, five hundred five million, two hundred fifty thousand, five hundred thirty-three".