205254705401 has 2 divisors, whose sum is σ = 205254705402. Its totient is φ = 205254705400.

The previous prime is 205254705391. The next prime is 205254705479. The reversal of 205254705401 is 104507452502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 172719204025 + 32535501376 = 415595^2 + 180376^2 .

It is a cyclic number.

It is not a de Polignac number, because 205254705401 - 2¹⁸ = 205254443257 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (205254707401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102627352700 + 102627352701.

It is an arithmetic number, because the mean of its divisors is an integer number (102627352701).

Almost surely, 2^205254705401 is an apocalyptic number.

It is an amenable number.

205254705401 is a deficient number, since it is larger than the sum of its proper divisors (1).

205254705401 is an equidigital number, since it uses as much as digits as its factorization.

205254705401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56000, while the sum is 35.

The spelling of 205254705401 in words is "two hundred five billion, two hundred fifty-four million, seven hundred five thousand, four hundred one".