165641101 has 8 divisors (see below), whose sum is σ = 173571840. Its totient is φ = 157771152.

The previous prime is 165641093. The next prime is 165641129. The reversal of 165641101 is 101146561.

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 165641101 - 2³ = 165641093 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 (165641171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9570 + ... + 20563.

It is an arithmetic number, because the mean of its divisors is an integer number (21696480).

Almost surely, 2^165641101 is an apocalyptic number.

It is an amenable number.

165641101 is a deficient number, since it is larger than the sum of its proper divisors (7930739).

165641101 is a wasteful number, since it uses less digits than its factorization.

165641101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30395.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 165641101 is about 12870.1632079784. The cubic root of 165641101 is about 549.1901038499.

Adding to 165641101 its reverse (101146561), we get a palindrome (266787662).

The spelling of 165641101 in words is "one hundred sixty-five million, six hundred forty-one thousand, one hundred one".