16505162533 has 4 divisors (see below), whose sum is σ = 16816580748. Its totient is φ = 16193744320.

The previous prime is 16505162491. The next prime is 16505162539. The reversal of 16505162533 is 33526150561.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5609560609 + 10895601924 = 74897^2 + 104382^2 .

It is a cyclic number.

It is not a de Polignac number, because 16505162533 - 2¹⁷ = 16505031461 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16505162492 and 16505162501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16505162539) 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 in 3 ways as a sum of consecutive naturals, for example, 155709028 + ... + 155709133.

It is an arithmetic number, because the mean of its divisors is an integer number (4204145187).

Almost surely, 2^16505162533 is an apocalyptic number.

It is an amenable number.

16505162533 is a deficient number, since it is larger than the sum of its proper divisors (311418215).

16505162533 is an equidigital number, since it uses as much as digits as its factorization.

16505162533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311418214.

The product of its (nonzero) digits is 81000, while the sum is 37.

The spelling of 16505162533 in words is "sixteen billion, five hundred five million, one hundred sixty-two thousand, five hundred thirty-three".