16439086225 has 9 divisors (see below), whose sum is σ = 20385261883. Its totient is φ = 13150756120.

The previous prime is 16439086219. The next prime is 16439086231. The reversal of 16439086225 is 52268093461.

The square root of 16439086225 is 128215.

It is a perfect power (a square), and thus also a powerful number.

16439086225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (16439086219) and next prime (16439086231).

It can be written as a sum of positive squares in only one way, i.e., 5918071041 + 10521015184 = 76929^2 + 102572^2 .

It is not a de Polignac number, because 16439086225 - 2¹⁷ = 16438955153 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 (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 628254 + ... + 653896.

Almost surely, 2^16439086225 is an apocalyptic number.

16439086225 is the 128215-th square number.

16439086225 is the 64108-th centered octagonal number.

It is an amenable number.

16439086225 is a deficient number, since it is larger than the sum of its proper divisors (3946175658).

16439086225 is an frugal number, since it uses more digits than its factorization.

16439086225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51296 (or 25648 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 46.

The spelling of 16439086225 in words is "sixteen billion, four hundred thirty-nine million, eighty-six thousand, two hundred twenty-five".