165608393641 has 8 divisors (see below), whose sum is σ = 166887841824. Its totient is φ = 164329176960.

The previous prime is 165608393609. The next prime is 165608393651. The reversal of 165608393641 is 146393806561.

165608393641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 165608393641 - 2⁵ = 165608393609 is a prime.

It is a super-2 number, since 2×165608393641² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165608393651) 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, 1550041 + ... + 1653433.

It is an arithmetic number, because the mean of its divisors is an integer number (20860980228).

Almost surely, 2^165608393641 is an apocalyptic number.

It is an amenable number.

165608393641 is a deficient number, since it is larger than the sum of its proper divisors (1279448183).

165608393641 is a wasteful number, since it uses less digits than its factorization.

165608393641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115751.

The product of its (nonzero) digits is 2799360, while the sum is 52.

It can be divided in two parts, 165 and 608393641, that added together give a palindrome (608393806).

The spelling of 165608393641 in words is "one hundred sixty-five billion, six hundred eight million, three hundred ninety-three thousand, six hundred forty-one".