1605561652 has 12 divisors (see below), whose sum is σ = 2810045056. Its totient is φ = 802691640.

The previous prime is 1605561647. The next prime is 1605561677. The reversal of 1605561652 is 2561655061.

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 3 ways as a sum of consecutive naturals, for example, 34003 + ... + 66085.

Almost surely, 2^1605561652 is an apocalyptic number.

It is an amenable number.

1605561652 is a deficient number, since it is larger than the sum of its proper divisors (1204483404).

1605561652 is a wasteful number, since it uses less digits than its factorization.

1605561652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44598 (or 44596 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 37.

The square root of 1605561652 is about 40069.4603407633. The cubic root of 1605561652 is about 1170.9607254988.

The spelling of 1605561652 in words is "one billion, six hundred five million, five hundred sixty-one thousand, six hundred fifty-two".