205360521644543 has 2 divisors, whose sum is σ = 205360521644544. Its totient is φ = 205360521644542.

The previous prime is 205360521644503. The next prime is 205360521644549. The reversal of 205360521644543 is 345446125063502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 205360521644543 - 2¹² = 205360521640447 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 205360521644491 and 205360521644500.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205360521644549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102680260822271 + 102680260822272.

It is an arithmetic number, because the mean of its divisors is an integer number (102680260822272).

Almost surely, 2^{205360521644543} is an apocalyptic number.

205360521644543 is a deficient number, since it is larger than the sum of its proper divisors (1).

205360521644543 is an equidigital number, since it uses as much as digits as its factorization.

205360521644543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368000, while the sum is 50.

The spelling of 205360521644543 in words is "two hundred five trillion, three hundred sixty billion, five hundred twenty-one million, six hundred forty-four thousand, five hundred forty-three".