205254705479 has 2 divisors, whose sum is σ = 205254705480. Its totient is φ = 205254705478.

The previous prime is 205254705401. The next prime is 205254705517. The reversal of 205254705479 is 974507452502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 205254705479 - 2³⁶ = 136535228743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205254705379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102627352739 + 102627352740.

It is an arithmetic number, because the mean of its divisors is an integer number (102627352740).

Almost surely, 2^205254705479 is an apocalyptic number.

205254705479 is a deficient number, since it is larger than the sum of its proper divisors (1).

205254705479 is an equidigital number, since it uses as much as digits as its factorization.

205254705479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528000, while the sum is 50.

The spelling of 205254705479 in words is "two hundred five billion, two hundred fifty-four million, seven hundred five thousand, four hundred seventy-nine".