205560144604461 has 8 divisors (see below), whose sum is σ = 274080264961120. Its totient is φ = 137040060325392.

The previous prime is 205560144604433. The next prime is 205560144604471. The reversal of 205560144604461 is 164406441065502.

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

It is not a de Polignac number, because 205560144604461 - 2⁷ = 205560144604333 is a prime.

It is a super-2 number, since 2×205560144604461² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 205560144604461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205560144604421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10012110 + ... + 22613328.

It is an arithmetic number, because the mean of its divisors is an integer number (34260033120140).

Almost surely, 2^{205560144604461} is an apocalyptic number.

It is an amenable number.

205560144604461 is a deficient number, since it is larger than the sum of its proper divisors (68520120356659).

205560144604461 is a wasteful number, since it uses less digits than its factorization.

205560144604461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18038795.

The product of its (nonzero) digits is 2764800, while the sum is 48.

Adding to 205560144604461 its reverse (164406441065502), we get a palindrome (369966585669963).

The spelling of 205560144604461 in words is "two hundred five trillion, five hundred sixty billion, one hundred forty-four million, six hundred four thousand, four hundred sixty-one".