165055505660511 has 16 divisors (see below), whose sum is σ = 231657300422400. Its totient is φ = 104245379854848.

The previous prime is 165055505660491. The next prime is 165055505660519. The reversal of 165055505660511 is 115066505550561.

It is not a de Polignac number, because 165055505660511 - 2³³ = 165046915725919 is a prime.

It is a super-2 number, since 2×165055505660511² (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 (165055505660519) 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, 30110190 + ... + 35167236.

It is an arithmetic number, because the mean of its divisors is an integer number (14478581276400).

Almost surely, 2^{165055505660511} is an apocalyptic number.

165055505660511 is a deficient number, since it is larger than the sum of its proper divisors (66601794761889).

165055505660511 is a wasteful number, since it uses less digits than its factorization.

165055505660511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5629678.

The product of its (nonzero) digits is 3375000, while the sum is 51.

The spelling of 165055505660511 in words is "one hundred sixty-five trillion, fifty-five billion, five hundred five million, six hundred sixty thousand, five hundred eleven".