198165265 has 8 divisors (see below), whose sum is σ = 245998440. Its totient is φ = 153065472.

The previous prime is 198165221. The next prime is 198165313. The reversal of 198165265 is 562561891.

It can be written as a sum of positive squares in 4 ways, for example, as 14047504 + 184117761 = 3748^2 + 13569^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 198165265 - 2⁷ = 198165137 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 683184 + ... + 683473.

It is an arithmetic number, because the mean of its divisors is an integer number (30749805).

Almost surely, 2^198165265 is an apocalyptic number.

It is an amenable number.

198165265 is a deficient number, since it is larger than the sum of its proper divisors (47833175).

198165265 is a wasteful number, since it uses less digits than its factorization.

198165265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1366691.

The product of its digits is 129600, while the sum is 43.

The square root of 198165265 is about 14077.1184906571. The cubic root of 198165265 is about 583.0097853834.

The spelling of 198165265 in words is "one hundred ninety-eight million, one hundred sixty-five thousand, two hundred sixty-five".