165650453 has 6 divisors (see below), whose sum is σ = 171167382. Its totient is φ = 160305960.

The previous prime is 165650447. The next prime is 165650477. The reversal of 165650453 is 354056561.

165650453 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 159188689 + 6461764 = 12617^2 + 2542^2 .

It is not a de Polignac number, because 165650453 - 2⁴ = 165650437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165650423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 85226 + ... + 87147.

It is an arithmetic number, because the mean of its divisors is an integer number (28527897).

Almost surely, 2^165650453 is an apocalyptic number.

It is an amenable number.

165650453 is a deficient number, since it is larger than the sum of its proper divisors (5516929).

165650453 is an equidigital number, since it uses as much as digits as its factorization.

165650453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172435 (or 172404 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 35.

The square root of 165650453 is about 12870.5265238062. The cubic root of 165650453 is about 549.2004393065.

The spelling of 165650453 in words is "one hundred sixty-five million, six hundred fifty thousand, four hundred fifty-three".