205412445439 has 2 divisors, whose sum is σ = 205412445440. Its totient is φ = 205412445438.

The previous prime is 205412445397. The next prime is 205412445449. The reversal of 205412445439 is 934544214502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 205412445439 - 2⁹ = 205412444927 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 205412445395 and 205412445404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205412445449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102706222719 + 102706222720.

It is an arithmetic number, because the mean of its divisors is an integer number (102706222720).

Almost surely, 2^205412445439 is an apocalyptic number.

205412445439 is a deficient number, since it is larger than the sum of its proper divisors (1).

205412445439 is an equidigital number, since it uses as much as digits as its factorization.

205412445439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 691200, while the sum is 43.

The spelling of 205412445439 in words is "two hundred five billion, four hundred twelve million, four hundred forty-five thousand, four hundred thirty-nine".