204660155243 has 2 divisors, whose sum is σ = 204660155244. Its totient is φ = 204660155242.

The previous prime is 204660155213. The next prime is 204660155281. The reversal of 204660155243 is 342551066402.

It is an a-pointer prime, because the next prime (204660155281) can be obtained adding 204660155243 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 204660155243 - 2⁸ = 204660154987 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 204660155197 and 204660155206.

It is not a weakly prime, because it can be changed into another prime (204660155213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102330077621 + 102330077622.

It is an arithmetic number, because the mean of its divisors is an integer number (102330077622).

Almost surely, 2^204660155243 is an apocalyptic number.

204660155243 is a deficient number, since it is larger than the sum of its proper divisors (1).

204660155243 is an equidigital number, since it uses as much as digits as its factorization.

204660155243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 172800, while the sum is 38.

The spelling of 204660155243 in words is "two hundred four billion, six hundred sixty million, one hundred fifty-five thousand, two hundred forty-three".