205535880438271 has 4 divisors (see below), whose sum is σ = 206237368085112. Its totient is φ = 204834392791432.

The previous prime is 205535880438269. The next prime is 205535880438281. The reversal of 205535880438271 is 172834088535502.

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

It is a cyclic number.

It is not a de Polignac number, because 205535880438271 - 2¹ = 205535880438269 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 (205535880438281) 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, 350743822981 + ... + 350743823566.

It is an arithmetic number, because the mean of its divisors is an integer number (51559342021278).

Almost surely, 2^{205535880438271} is an apocalyptic number.

205535880438271 is a deficient number, since it is larger than the sum of its proper divisors (701487646841).

205535880438271 is an equidigital number, since it uses as much as digits as its factorization.

205535880438271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701487646840.

The product of its (nonzero) digits is 64512000, while the sum is 61.

The spelling of 205535880438271 in words is "two hundred five trillion, five hundred thirty-five billion, eight hundred eighty million, four hundred thirty-eight thousand, two hundred seventy-one".