1608990845 has 24 divisors (see below), whose sum is σ = 2425460352. Its totient is φ = 1003004640.

The previous prime is 1608990811. The next prime is 1608990871. The reversal of 1608990845 is 5480998061.

It is a happy number.

It is not a de Polignac number, because 1608990845 - 2¹⁰ = 1608989821 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1608990793 and 1608990802.

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 23 ways as a sum of consecutive naturals, for example, 185729 + ... + 194198.

It is an arithmetic number, because the mean of its divisors is an integer number (101060848).

Almost surely, 2^1608990845 is an apocalyptic number.

It is an amenable number.

1608990845 is a deficient number, since it is larger than the sum of its proper divisors (816469507).

1608990845 is a wasteful number, since it uses less digits than its factorization.

1608990845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379961 (or 379950 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 50.

The square root of 1608990845 is about 40112.2281231048. The cubic root of 1608990845 is about 1171.7937870309.

The spelling of 1608990845 in words is "one billion, six hundred eight million, nine hundred ninety thousand, eight hundred forty-five".