205442002220061 has 8 divisors (see below), whose sum is σ = 273922843342720. Its totient is φ = 136961247955392.

The previous prime is 205442002220057. The next prime is 205442002220111. The reversal of 205442002220061 is 160022200244502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 205442002220061 - 2² = 205442002220057 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 (205442002224061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15979141 + ... + 25811178.

It is an arithmetic number, because the mean of its divisors is an integer number (34240355417840).

Almost surely, 2^{205442002220061} is an apocalyptic number.

It is an amenable number.

205442002220061 is a deficient number, since it is larger than the sum of its proper divisors (68480841122659).

205442002220061 is a wasteful number, since it uses less digits than its factorization.

205442002220061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43428995.

The product of its (nonzero) digits is 15360, while the sum is 30.

Adding to 205442002220061 its reverse (160022200244502), we get a palindrome (365464202464563).

The spelling of 205442002220061 in words is "two hundred five trillion, four hundred forty-two billion, two million, two hundred twenty thousand, sixty-one".