165449044241 has 4 divisors (see below), whose sum is σ = 178175893812. Its totient is φ = 152722194672.

The previous prime is 165449044231. The next prime is 165449044247. The reversal of 165449044241 is 142440944561.

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

It can be written as a sum of positive squares in 2 ways, for example, as 63131587600 + 102317456641 = 251260^2 + 319871^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165449044241 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165449044192 and 165449044201.

It is not an unprimeable number, because it can be changed into a prime (165449044247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6363424766 + ... + 6363424791.

It is an arithmetic number, because the mean of its divisors is an integer number (44543973453).

Almost surely, 2^165449044241 is an apocalyptic number.

It is an amenable number.

165449044241 is a deficient number, since it is larger than the sum of its proper divisors (12726849571).

165449044241 is a wasteful number, since it uses less digits than its factorization.

165449044241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12726849570.

The product of its (nonzero) digits is 552960, while the sum is 44.

The spelling of 165449044241 in words is "one hundred sixty-five billion, four hundred forty-nine million, forty-four thousand, two hundred forty-one".