205126776971 has 2 divisors, whose sum is σ = 205126776972. Its totient is φ = 205126776970.

The previous prime is 205126776941. The next prime is 205126776997. The reversal of 205126776971 is 179677621502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 205126776971 - 2¹⁰ = 205126775947 is a prime.

It is not a weakly prime, because it can be changed into another prime (205126776941) 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, 102563388485 + 102563388486.

It is an arithmetic number, because the mean of its divisors is an integer number (102563388486).

Almost surely, 2^205126776971 is an apocalyptic number.

205126776971 is a deficient number, since it is larger than the sum of its proper divisors (1).

205126776971 is an equidigital number, since it uses as much as digits as its factorization.

205126776971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2222640, while the sum is 53.

The spelling of 205126776971 in words is "two hundred five billion, one hundred twenty-six million, seven hundred seventy-six thousand, nine hundred seventy-one".