205356012536447 has 2 divisors, whose sum is σ = 205356012536448. Its totient is φ = 205356012536446.

The previous prime is 205356012536431. The next prime is 205356012536567. The reversal of 205356012536447 is 744635210653502.

205356012536447 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 205356012536447 - 2⁴ = 205356012536431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205356014536447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102678006268223 + 102678006268224.

It is an arithmetic number, because the mean of its divisors is an integer number (102678006268224).

Almost surely, 2^{205356012536447} is an apocalyptic number.

205356012536447 is a deficient number, since it is larger than the sum of its proper divisors (1).

205356012536447 is an equidigital number, since it uses as much as digits as its factorization.

205356012536447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144000, while the sum is 53.

The spelling of 205356012536447 in words is "two hundred five trillion, three hundred fifty-six billion, twelve million, five hundred thirty-six thousand, four hundred forty-seven".