206380407986449 has 2 divisors, whose sum is σ = 206380407986450. Its totient is φ = 206380407986448.

The previous prime is 206380407986419. The next prime is 206380407986461. The reversal of 206380407986449 is 944689704083602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 186056829270225 + 20323578716224 = 13640265^2 + 4508168^2 .

It is a cyclic number.

It is not a de Polignac number, because 206380407986449 - 2⁷ = 206380407986321 is a prime.

It is not a weakly prime, because it can be changed into another prime (206380407986419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103190203993224 + 103190203993225.

It is an arithmetic number, because the mean of its divisors is an integer number (103190203993225).

Almost surely, 2^{206380407986449} is an apocalyptic number.

It is an amenable number.

206380407986449 is a deficient number, since it is larger than the sum of its proper divisors (1).

206380407986449 is an equidigital number, since it uses as much as digits as its factorization.

206380407986449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 501645312, while the sum is 70.

The spelling of 206380407986449 in words is "two hundred six trillion, three hundred eighty billion, four hundred seven million, nine hundred eighty-six thousand, four hundred forty-nine".