16553530625 has 30 divisors (see below), whose sum is σ = 20817878334. Its totient is φ = 13158400000.

The previous prime is 16553530619. The next prime is 16553530633. The reversal of 16553530625 is 52603535561.

16553530625 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 15 ways, for example, as 3243985936 + 13309544689 = 56956^2 + 115367^2 .

It is a de Polignac number, because none of the positive numbers 2^k-16553530625 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 29 ways as a sum of consecutive naturals, for example, 41280425 + ... + 41280825.

Almost surely, 2^16553530625 is an apocalyptic number.

It is an amenable number.

16553530625 is a deficient number, since it is larger than the sum of its proper divisors (4264347709).

16553530625 is an frugal number, since it uses more digits than its factorization.

16553530625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 935 (or 663 counting only the distinct ones).

The product of its (nonzero) digits is 405000, while the sum is 41.

The spelling of 16553530625 in words is "sixteen billion, five hundred fifty-three million, five hundred thirty thousand, six hundred twenty-five".