1609663825 has 24 divisors (see below), whose sum is σ = 2488501440. Its totient is φ = 1003425600.

The previous prime is 1609663817. The next prime is 1609663841. The reversal of 1609663825 is 5283669061.

It is not a de Polignac number, because 1609663825 - 2³ = 1609663817 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 416170 + ... + 420019.

It is an arithmetic number, because the mean of its divisors is an integer number (103687560).

Almost surely, 2^1609663825 is an apocalyptic number.

It is an amenable number.

1609663825 is a deficient number, since it is larger than the sum of its proper divisors (878837615).

1609663825 is a wasteful number, since it uses less digits than its factorization.

1609663825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836217 (or 836212 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 46.

The square root of 1609663825 is about 40120.6159598778. The cubic root of 1609663825 is about 1171.9571365955.

The spelling of 1609663825 in words is "one billion, six hundred nine million, six hundred sixty-three thousand, eight hundred twenty-five".