165048445 has 4 divisors (see below), whose sum is σ = 198058140. Its totient is φ = 132038752.

The previous prime is 165048439. The next prime is 165048451. The reversal of 165048445 is 544840561.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (165048439) and next prime (165048451).

It can be written as a sum of positive squares in 2 ways, for example, as 26327161 + 138721284 = 5131^2 + 11778^2 .

It is a cyclic number.

It is not a de Polignac number, because 165048445 - 2²⁷ = 30830717 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16504840 + ... + 16504849.

It is an arithmetic number, because the mean of its divisors is an integer number (49514535).

Almost surely, 2^165048445 is an apocalyptic number.

It is an amenable number.

165048445 is a deficient number, since it is larger than the sum of its proper divisors (33009695).

165048445 is an equidigital number, since it uses as much as digits as its factorization.

165048445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33009694.

The product of its (nonzero) digits is 76800, while the sum is 37.

The square root of 165048445 is about 12847.1181593383. The cubic root of 165048445 is about 548.5343290721.

The spelling of 165048445 in words is "one hundred sixty-five million, forty-eight thousand, four hundred forty-five".