165002865 has 16 divisors (see below), whose sum is σ = 268334016. Its totient is φ = 86558400.

The previous prime is 165002861. The next prime is 165002879. The reversal of 165002865 is 568200561.

It is not a de Polignac number, because 165002865 - 2² = 165002861 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165002861) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 89251 + ... + 91080.

It is an arithmetic number, because the mean of its divisors is an integer number (16770876).

Almost surely, 2^165002865 is an apocalyptic number.

165002865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165002865 is a deficient number, since it is larger than the sum of its proper divisors (103331151).

165002865 is a wasteful number, since it uses less digits than its factorization.

165002865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180400.

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 165002865 is about 12845.3440981548. The cubic root of 165002865 is about 548.4838297644.

The spelling of 165002865 in words is "one hundred sixty-five million, two thousand, eight hundred sixty-five".