206415393085439 has 2 divisors, whose sum is σ = 206415393085440. Its totient is φ = 206415393085438.

The previous prime is 206415393085387. The next prime is 206415393085487. The reversal of 206415393085439 is 934580393514602.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 206415393085439 - 2¹² = 206415393081343 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206417393085439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103207696542719 + 103207696542720.

It is an arithmetic number, because the mean of its divisors is an integer number (103207696542720).

Almost surely, 2^{206415393085439} is an apocalyptic number.

206415393085439 is a deficient number, since it is larger than the sum of its proper divisors (1).

206415393085439 is an equidigital number, since it uses as much as digits as its factorization.

206415393085439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 83980800, while the sum is 62.

The spelling of 206415393085439 in words is "two hundred six trillion, four hundred fifteen billion, three hundred ninety-three million, eighty-five thousand, four hundred thirty-nine".