16505865453 has 48 divisors (see below), whose sum is σ = 28013575680. Its totient is φ = 8548293600.

The previous prime is 16505865451. The next prime is 16505865461. The reversal of 16505865453 is 35456850561.

It is a happy number.

It is not a de Polignac number, because 16505865453 - 2¹ = 16505865451 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16505865451) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 519808 + ... + 550646.

It is an arithmetic number, because the mean of its divisors is an integer number (583616160).

Almost surely, 2^16505865453 is an apocalyptic number.

It is an amenable number.

16505865453 is a deficient number, since it is larger than the sum of its proper divisors (11507710227).

16505865453 is a wasteful number, since it uses less digits than its factorization.

16505865453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31198 (or 31191 counting only the distinct ones).

The product of its (nonzero) digits is 2160000, while the sum is 48.

The spelling of 16505865453 in words is "sixteen billion, five hundred five million, eight hundred sixty-five thousand, four hundred fifty-three".