1605885916 has 6 divisors (see below), whose sum is σ = 2810300360. Its totient is φ = 802942956.

The previous prime is 1605885913. The next prime is 1605885923. The reversal of 1605885916 is 6195885061.

It is a self number, because there is not a number n which added to its sum of digits gives 1605885916.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1605885913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200735736 + ... + 200735743.

Almost surely, 2^1605885916 is an apocalyptic number.

It is an amenable number.

1605885916 is a deficient number, since it is larger than the sum of its proper divisors (1204414444).

1605885916 is a wasteful number, since it uses less digits than its factorization.

1605885916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401471483 (or 401471481 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 49.

The square root of 1605885916 is about 40073.5064100959. The cubic root of 1605885916 is about 1171.0395504279.

The spelling of 1605885916 in words is "one billion, six hundred five million, eight hundred eighty-five thousand, nine hundred sixteen".