16609625 has 16 divisors (see below), whose sum is σ = 20975760. Its totient is φ = 13129600.

The previous prime is 16609613. The next prime is 16609643. The reversal of 16609625 is 52690661.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 4700224 + 11909401 = 2168^2 + 3451^2 .

It is not a de Polignac number, because 16609625 - 2¹⁰ = 16608601 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10379 + ... + 11871.

It is an arithmetic number, because the mean of its divisors is an integer number (1310985).

Almost surely, 2^16609625 is an apocalyptic number.

It is an amenable number.

16609625 is a deficient number, since it is larger than the sum of its proper divisors (4366135).

16609625 is an equidigital number, since it uses as much as digits as its factorization.

16609625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1597 (or 1587 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 16609625 is about 4075.4907679935. The cubic root of 16609625 is about 255.1447339322.

The spelling of 16609625 in words is "sixteen million, six hundred nine thousand, six hundred twenty-five".