205142142529 has 2 divisors, whose sum is σ = 205142142530. Its totient is φ = 205142142528.

The previous prime is 205142142509. The next prime is 205142142599. The reversal of 205142142529 is 925241241502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203401000000 + 1741142529 = 451000^2 + 41727^2 .

It is a cyclic number.

It is not a de Polignac number, because 205142142529 - 2⁵ = 205142142497 is a prime.

It is not a weakly prime, because it can be changed into another prime (205142142509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102571071264 + 102571071265.

It is an arithmetic number, because the mean of its divisors is an integer number (102571071265).

Almost surely, 2^205142142529 is an apocalyptic number.

It is an amenable number.

205142142529 is a deficient number, since it is larger than the sum of its proper divisors (1).

205142142529 is an equidigital number, since it uses as much as digits as its factorization.

205142142529 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 57600, while the sum is 37.

The spelling of 205142142529 in words is "two hundred five billion, one hundred forty-two million, one hundred forty-two thousand, five hundred twenty-nine".