16816908445 has 4 divisors (see below), whose sum is σ = 20180290140. Its totient is φ = 13453526752.

The previous prime is 16816908421. The next prime is 16816908491. The reversal of 16816908445 is 54480961861.

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 7615878361 + 9201030084 = 87269^2 + 95922^2 .

It is a cyclic number.

It is not a de Polignac number, because 16816908445 - 2¹¹ = 16816906397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16816908392 and 16816908401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1681690840 + ... + 1681690849.

It is an arithmetic number, because the mean of its divisors is an integer number (5045072535).

Almost surely, 2^16816908445 is an apocalyptic number.

It is an amenable number.

16816908445 is a deficient number, since it is larger than the sum of its proper divisors (3363381695).

16816908445 is an equidigital number, since it uses as much as digits as its factorization.

16816908445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3363381694.

The product of its (nonzero) digits is 1658880, while the sum is 52.

The spelling of 16816908445 in words is "sixteen billion, eight hundred sixteen million, nine hundred eight thousand, four hundred forty-five".