1605065648 has 10 divisors (see below), whose sum is σ = 3109814724. Its totient is φ = 802532816.

The previous prime is 1605065647. The next prime is 1605065669. The reversal of 1605065648 is 8465605061.

It is a happy number.

It is a super-3 number, since 3×1605065648³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1605065647) by changing a digit.

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 as a sum of consecutive naturals, namely, 50158286 + ... + 50158317.

Almost surely, 2^1605065648 is an apocalyptic number.

It is an amenable number.

1605065648 is a deficient number, since it is larger than the sum of its proper divisors (1504749076).

1605065648 is a wasteful number, since it uses less digits than its factorization.

1605065648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100316611 (or 100316605 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 41.

The square root of 1605065648 is about 40063.2705604523. The cubic root of 1605065648 is about 1170.8401319728.

The spelling of 1605065648 in words is "one billion, six hundred five million, sixty-five thousand, six hundred forty-eight".