205145113340429 has 2 divisors, whose sum is σ = 205145113340430. Its totient is φ = 205145113340428.

The previous prime is 205145113340383. The next prime is 205145113340533. The reversal of 205145113340429 is 924043311541502.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203866852458025 + 1278260882404 = 14278195^2 + 1130602^2 .

It is a cyclic number.

It is not a de Polignac number, because 205145113340429 - 2⁸ = 205145113340173 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 205145113340429.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205145113340929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102572556670214 + 102572556670215.

It is an arithmetic number, because the mean of its divisors is an integer number (102572556670215).

Almost surely, 2^{205145113340429} is an apocalyptic number.

It is an amenable number.

205145113340429 is a deficient number, since it is larger than the sum of its proper divisors (1).

205145113340429 is an equidigital number, since it uses as much as digits as its factorization.

205145113340429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 518400, while the sum is 44.

The spelling of 205145113340429 in words is "two hundred five trillion, one hundred forty-five billion, one hundred thirteen million, three hundred forty thousand, four hundred twenty-nine".