16568323525 has 12 divisors (see below), whose sum is σ = 22125084772. Its totient is φ = 12235069440.

The previous prime is 16568323501. The next prime is 16568323549. The reversal of 16568323525 is 52532386561.

It is a Cunningham number, because it is equal to 128718²+1.

It is an interprime number because it is at equal distance from previous prime (16568323501) and next prime (16568323549).

It can be written as a sum of positive squares in 6 ways, for example, as 1 + 16568323524 = 1^2 + 128718^2 .

It is not a de Polignac number, because 16568323525 - 2¹¹ = 16568321477 is a prime.

It is a Duffinian number.

It is a congruent 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, 25489404 + ... + 25490053.

Almost surely, 2^16568323525 is an apocalyptic number.

It is an amenable number.

16568323525 is a deficient number, since it is larger than the sum of its proper divisors (5556761247).

16568323525 is a wasteful number, since it uses less digits than its factorization.

16568323525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50979480 (or 50979475 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 46.

The spelling of 16568323525 in words is "sixteen billion, five hundred sixty-eight million, three hundred twenty-three thousand, five hundred twenty-five".