165143520521411 has 16 divisors (see below), whose sum is σ = 175088505043200. Its totient is φ = 155323891548000.

The previous prime is 165143520521347. The next prime is 165143520521533. The reversal of 165143520521411 is 114125025341561.

It is a cyclic number.

It is not a de Polignac number, because 165143520521411 - 2⁶ = 165143520521347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165143520521011) 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, 192023261 + ... + 192881361.

It is an arithmetic number, because the mean of its divisors is an integer number (10943031565200).

Almost surely, 2^{165143520521411} is an apocalyptic number.

165143520521411 is a deficient number, since it is larger than the sum of its proper divisors (9944984521789).

165143520521411 is a wasteful number, since it uses less digits than its factorization.

165143520521411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931130.

The product of its (nonzero) digits is 144000, while the sum is 41.

Adding to 165143520521411 its reverse (114125025341561), we get a palindrome (279268545862972).

The spelling of 165143520521411 in words is "one hundred sixty-five trillion, one hundred forty-three billion, five hundred twenty million, five hundred twenty-one thousand, four hundred eleven".