16819045465 has 12 divisors (see below), whose sum is σ = 20902818924. Its totient is φ = 12991259456.

The previous prime is 16819045427. The next prime is 16819045501. The reversal of 16819045465 is 56454091861.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 239135296 + 16579910169 = 15464^2 + 128763^2 .

It is not a de Polignac number, because 16819045465 - 2⁷ = 16819045337 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1995682 + ... + 2004091.

It is an arithmetic number, because the mean of its divisors is an integer number (1741901577).

Almost surely, 2^16819045465 is an apocalyptic number.

It is an amenable number.

16819045465 is a deficient number, since it is larger than the sum of its proper divisors (4083773459).

16819045465 is an equidigital number, since it uses as much as digits as its factorization.

16819045465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3999836 (or 3999807 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 49.

The spelling of 16819045465 in words is "sixteen billion, eight hundred nineteen million, forty-five thousand, four hundred sixty-five".