205424203544345 has 8 divisors (see below), whose sum is σ = 248450060350464. Its totient is φ = 163045352103984.

The previous prime is 205424203544297. The next prime is 205424203544381. The reversal of 205424203544345 is 543445302424502.

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

It is a cyclic number.

It is not a de Polignac number, because 205424203544345 - 2²⁰ = 205424202495769 is a prime.

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 205424203544345.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161751340739 + ... + 161751342008.

It is an arithmetic number, because the mean of its divisors is an integer number (31056257543808).

Almost surely, 2^{205424203544345} is an apocalyptic number.

It is an amenable number.

205424203544345 is a deficient number, since it is larger than the sum of its proper divisors (43025856806119).

205424203544345 is a wasteful number, since it uses less digits than its factorization.

205424203544345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323502682879.

The product of its (nonzero) digits is 9216000, while the sum is 47.

Adding to 205424203544345 its reverse (543445302424502), we get a palindrome (748869505968847).

The spelling of 205424203544345 in words is "two hundred five trillion, four hundred twenty-four billion, two hundred three million, five hundred forty-four thousand, three hundred forty-five".