16505050603 has 4 divisors (see below), whose sum is σ = 16507160208. Its totient is φ = 16502941000.

The previous prime is 16505050553. The next prime is 16505050637. The reversal of 16505050603 is 30605050561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30605050561 = 229 ⋅133646509.

It is a cyclic number.

It is not a de Polignac number, because 16505050603 - 2⁹ = 16505050091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16505050103) 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, 1043023 + ... + 1058728.

It is an arithmetic number, because the mean of its divisors is an integer number (4126790052).

Almost surely, 2^16505050603 is an apocalyptic number.

16505050603 is a deficient number, since it is larger than the sum of its proper divisors (2109605).

16505050603 is an equidigital number, since it uses as much as digits as its factorization.

16505050603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2109604.

The product of its (nonzero) digits is 13500, while the sum is 31.

The spelling of 16505050603 in words is "sixteen billion, five hundred five million, fifty thousand, six hundred three".