165360163020533 has 4 divisors (see below), whose sum is σ = 178080175560588. Its totient is φ = 152640150480480.

The previous prime is 165360163020511. The next prime is 165360163020551. The reversal of 165360163020533 is 335020361063561.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22996177657489 + 142363985363044 = 4795433^2 + 11931638^2 .

It is not a de Polignac number, because 165360163020533 - 2²⁰ = 165360161971957 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 (165360163020233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6360006270008 + ... + 6360006270033.

It is an arithmetic number, because the mean of its divisors is an integer number (44520043890147).

Almost surely, 2^{165360163020533} is an apocalyptic number.

165360163020533 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

165360163020533 is a deficient number, since it is larger than the sum of its proper divisors (12720012540055).

165360163020533 is a wasteful number, since it uses less digits than its factorization.

165360163020533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12720012540054.

The product of its (nonzero) digits is 874800, while the sum is 44.

The spelling of 165360163020533 in words is "one hundred sixty-five trillion, three hundred sixty billion, one hundred sixty-three million, twenty thousand, five hundred thirty-three".