165455605 has 24 divisors (see below), whose sum is σ = 231547680. Its totient is φ = 113168160.

The previous prime is 165455599. The next prime is 165455639. The reversal of 165455605 is 506554561.

It is not a de Polignac number, because 165455605 - 2⁵ = 165455573 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 151110 + ... + 152200.

It is an arithmetic number, because the mean of its divisors is an integer number (9647820).

Almost surely, 2^165455605 is an apocalyptic number.

It is an amenable number.

165455605 is a deficient number, since it is larger than the sum of its proper divisors (66092075).

165455605 is a wasteful number, since it uses less digits than its factorization.

165455605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1729 (or 1722 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 37.

The square root of 165455605 is about 12862.9547538658. The cubic root of 165455605 is about 548.9850206540.

The spelling of 165455605 in words is "one hundred sixty-five million, four hundred fifty-five thousand, six hundred five".