16813425217 has 8 divisors (see below), whose sum is σ = 16950853800. Its totient is φ = 16676459520.

The previous prime is 16813425199. The next prime is 16813425269. The reversal of 16813425217 is 71252431861.

It can be written as a sum of positive squares in 4 ways, for example, as 1060414096 + 15753011121 = 32564^2 + 125511^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16813425217 - 2¹¹ = 16813423169 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16813425217.

It is not an unprimeable number, because it can be changed into a prime (16813428217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42592 + ... + 188257.

It is an arithmetic number, because the mean of its divisors is an integer number (2118856725).

Almost surely, 2^16813425217 is an apocalyptic number.

It is an amenable number.

16813425217 is a deficient number, since it is larger than the sum of its proper divisors (137428583).

16813425217 is a wasteful number, since it uses less digits than its factorization.

16813425217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231443.

The product of its digits is 80640, while the sum is 40.

The spelling of 16813425217 in words is "sixteen billion, eight hundred thirteen million, four hundred twenty-five thousand, two hundred seventeen".