165011565 has 8 divisors (see below), whose sum is σ = 264018528. Its totient is φ = 88006160.

The previous prime is 165011563. The next prime is 165011603. The reversal of 165011565 is 565110561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 165011565 - 2¹ = 165011563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165011563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5500371 + ... + 5500400.

It is an arithmetic number, because the mean of its divisors is an integer number (33002316).

Almost surely, 2^165011565 is an apocalyptic number.

165011565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165011565 is a deficient number, since it is larger than the sum of its proper divisors (99006963).

165011565 is a wasteful number, since it uses less digits than its factorization.

165011565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11000779.

The product of its (nonzero) digits is 4500, while the sum is 30.

The square root of 165011565 is about 12845.6827377917. The cubic root of 165011565 is about 548.4934694465.

The spelling of 165011565 in words is "one hundred sixty-five million, eleven thousand, five hundred sixty-five".