165440241236541 has 16 divisors (see below), whose sum is σ = 221977906381440. Its totient is φ = 109600126732800.

The previous prime is 165440241236527. The next prime is 165440241236587. The reversal of 165440241236541 is 145632142044561.

It is not a de Polignac number, because 165440241236541 - 2¹¹ = 165440241234493 is a prime.

It is a super-2 number, since 2×165440241236541² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165440241236521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 261134296 + ... + 261767073.

It is an arithmetic number, because the mean of its divisors is an integer number (13873619148840).

Almost surely, 2^{165440241236541} is an apocalyptic number.

It is an amenable number.

165440241236541 is a deficient number, since it is larger than the sum of its proper divisors (56537665144899).

165440241236541 is a wasteful number, since it uses less digits than its factorization.

165440241236541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522902036.

The product of its (nonzero) digits is 2764800, while the sum is 48.

The spelling of 165440241236541 in words is "one hundred sixty-five trillion, four hundred forty billion, two hundred forty-one million, two hundred thirty-six thousand, five hundred forty-one".