165505473 has 48 divisors (see below), whose sum is σ = 279991296. Its totient is φ = 92262240.

The previous prime is 165505469. The next prime is 165505507. The reversal of 165505473 is 374505561.

165505473 is a `hidden beast` number, since 1 + 65 + 50 + 547 + 3 = 666.

It is not a de Polignac number, because 165505473 - 2² = 165505469 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165505423) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 728986 + ... + 729212.

It is an arithmetic number, because the mean of its divisors is an integer number (5833152).

Almost surely, 2^165505473 is an apocalyptic number.

It is an amenable number.

165505473 is a deficient number, since it is larger than the sum of its proper divisors (114485823).

165505473 is a wasteful number, since it uses less digits than its factorization.

165505473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474 (or 471 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 36.

The square root of 165505473 is about 12864.8930426957. The cubic root of 165505473 is about 549.0401694557.

The spelling of 165505473 in words is "one hundred sixty-five million, five hundred five thousand, four hundred seventy-three".