204555140345 has 8 divisors (see below), whose sum is σ = 245703799176. Its totient is φ = 163485691776.

The previous prime is 204555140299. The next prime is 204555140347. The reversal of 204555140345 is 543041555402.

It can be written as a sum of positive squares in 4 ways, for example, as 92292617209 + 112262523136 = 303797^2 + 335056^2 .

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 204555140345 - 2¹⁴ = 204555123961 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 204555140299 and 204555140308.

It is not an unprimeable number, because it can be changed into a prime (204555140347) 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, 19796882 + ... + 19807211.

It is an arithmetic number, because the mean of its divisors is an integer number (30712974897).

Almost surely, 2^204555140345 is an apocalyptic number.

It is an amenable number.

204555140345 is a deficient number, since it is larger than the sum of its proper divisors (41148658831).

204555140345 is a wasteful number, since it uses less digits than its factorization.

204555140345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39605131.

The product of its (nonzero) digits is 240000, while the sum is 38.

Adding to 204555140345 its reverse (543041555402), we get a palindrome (747596695747).

The spelling of 204555140345 in words is "two hundred four billion, five hundred fifty-five million, one hundred forty thousand, three hundred forty-five".