165545384287 has 4 divisors (see below), whose sum is σ = 165546536400. Its totient is φ = 165544232176.

The previous prime is 165545384267. The next prime is 165545384309. The reversal of 165545384287 is 782483545561.

165545384287 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 165545384287 - 2¹⁵ = 165545351519 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 (165545384267) 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 3 ways as a sum of consecutive naturals, for example, 323662 + ... + 660187.

It is an arithmetic number, because the mean of its divisors is an integer number (41386634100).

Almost surely, 2^165545384287 is an apocalyptic number.

165545384287 is a deficient number, since it is larger than the sum of its proper divisors (1152113).

165545384287 is an equidigital number, since it uses as much as digits as its factorization.

165545384287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152112.

The product of its digits is 32256000, while the sum is 58.

The spelling of 165545384287 in words is "one hundred sixty-five billion, five hundred forty-five million, three hundred eighty-four thousand, two hundred eighty-seven".