165450361 has 8 divisors (see below), whose sum is σ = 168754824. Its totient is φ = 162165120.

The previous prime is 165450353. The next prime is 165450371. The reversal of 165450361 is 163054561.

It can be written as a sum of positive squares in 4 ways, for example, as 1610361 + 163840000 = 1269^2 + 12800^2 .

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 165450361 - 2³ = 165450353 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165450301) 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, 13245 + ... + 22501.

It is an arithmetic number, because the mean of its divisors is an integer number (21094353).

Almost surely, 2^165450361 is an apocalyptic number.

It is an amenable number.

165450361 is a deficient number, since it is larger than the sum of its proper divisors (3304463).

165450361 is an equidigital number, since it uses as much as digits as its factorization.

165450361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9611.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 165450361 is about 12862.7509110610. The cubic root of 165450361 is about 548.9792206937.

The spelling of 165450361 in words is "one hundred sixty-five million, four hundred fifty thousand, three hundred sixty-one".