206471464104109 has 2 divisors, whose sum is σ = 206471464104110. Its totient is φ = 206471464104108.

The previous prime is 206471464104083. The next prime is 206471464104133. The reversal of 206471464104109 is 901401464174602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110502207072009 + 95969257032100 = 10512003^2 + 9796390^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206471464104109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206471464101109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103235732052054 + 103235732052055.

It is an arithmetic number, because the mean of its divisors is an integer number (103235732052055).

Almost surely, 2^{206471464104109} is an apocalyptic number.

It is an amenable number.

206471464104109 is a deficient number, since it is larger than the sum of its proper divisors (1).

206471464104109 is an equidigital number, since it uses as much as digits as its factorization.

206471464104109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1161216, while the sum is 49.

The spelling of 206471464104109 in words is "two hundred six trillion, four hundred seventy-one billion, four hundred sixty-four million, one hundred four thousand, one hundred nine".