205405553441453 has 2 divisors, whose sum is σ = 205405553441454. Its totient is φ = 205405553441452.

The previous prime is 205405553441449. The next prime is 205405553441503. The reversal of 205405553441453 is 354144355504502.

205405553441453 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (205405553441503) can be obtained adding 205405553441453 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205274333450404 + 131219991049 = 14327398^2 + 362243^2 .

It is a cyclic number.

It is not a de Polignac number, because 205405553441453 - 2² = 205405553441449 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205405553441353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102702776720726 + 102702776720727.

It is an arithmetic number, because the mean of its divisors is an integer number (102702776720727).

Almost surely, 2^{205405553441453} is an apocalyptic number.

It is an amenable number.

205405553441453 is a deficient number, since it is larger than the sum of its proper divisors (1).

205405553441453 is an equidigital number, since it uses as much as digits as its factorization.

205405553441453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400000, while the sum is 50.

The spelling of 205405553441453 in words is "two hundred five trillion, four hundred five billion, five hundred fifty-three million, four hundred forty-one thousand, four hundred fifty-three".