16533260503 has 4 divisors (see below), whose sum is σ = 16555633720. Its totient is φ = 16510887288.

The previous prime is 16533260479. The next prime is 16533260543. The reversal of 16533260503 is 30506233561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30506233561 = 1283 ⋅23777267.

It is a cyclic number.

It is not a de Polignac number, because 16533260503 - 2²⁵ = 16499706071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16533260543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11185500 + ... + 11186977.

It is an arithmetic number, because the mean of its divisors is an integer number (4138908430).

Almost surely, 2^16533260503 is an apocalyptic number.

16533260503 is a deficient number, since it is larger than the sum of its proper divisors (22373217).

16533260503 is an equidigital number, since it uses as much as digits as its factorization.

16533260503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22373216.

The product of its (nonzero) digits is 48600, while the sum is 34.

The spelling of 16533260503 in words is "sixteen billion, five hundred thirty-three million, two hundred sixty thousand, five hundred three".