205134413555087 has 2 divisors, whose sum is σ = 205134413555088. Its totient is φ = 205134413555086.

The previous prime is 205134413555083. The next prime is 205134413555143. The reversal of 205134413555087 is 780555314431502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 205134413555087 - 2² = 205134413555083 is a prime.

It is a super-2 number, since 2×205134413555087² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205134413555081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102567206777543 + 102567206777544.

It is an arithmetic number, because the mean of its divisors is an integer number (102567206777544).

Almost surely, 2^{205134413555087} is an apocalyptic number.

205134413555087 is a deficient number, since it is larger than the sum of its proper divisors (1).

205134413555087 is an equidigital number, since it uses as much as digits as its factorization.

205134413555087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080000, while the sum is 53.

Adding to 205134413555087 its reverse (780555314431502), we get a palindrome (985689727986589).

The spelling of 205134413555087 in words is "two hundred five trillion, one hundred thirty-four billion, four hundred thirteen million, five hundred fifty-five thousand, eighty-seven".