1605601608 has 32 divisors (see below), whose sum is σ = 4322774400. Its totient is φ = 494031168.

The previous prime is 1605601607. The next prime is 1605601619. The reversal of 1605601608 is 8061065061.

1605601608 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1605601608² = 5155913047224371328, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1605601607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2572768 + ... + 2573391.

It is an arithmetic number, because the mean of its divisors is an integer number (135086700).

Almost surely, 2^1605601608 is an apocalyptic number.

It is an amenable number.

1605601608 is an abundant number, since it is smaller than the sum of its proper divisors (2717172792).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1605601608 is a wasteful number, since it uses less digits than its factorization.

1605601608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5146181 (or 5146177 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 1605601608 is about 40069.9589218656. The cubic root of 1605601608 is about 1170.9704389260.

Adding to 1605601608 its reverse (8061065061), we get a palindrome (9666666669).

The spelling of 1605601608 in words is "one billion, six hundred five million, six hundred one thousand, six hundred eight".