206138935259 has 2 divisors, whose sum is σ = 206138935260. Its totient is φ = 206138935258.

The previous prime is 206138935243. The next prime is 206138935319. The reversal of 206138935259 is 952539831602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 206138935259 - 2⁴ = 206138935243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 206138935259.

It is not a weakly prime, because it can be changed into another prime (206138937259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103069467629 + 103069467630.

It is an arithmetic number, because the mean of its divisors is an integer number (103069467630).

Almost surely, 2^206138935259 is an apocalyptic number.

206138935259 is a deficient number, since it is larger than the sum of its proper divisors (1).

206138935259 is an equidigital number, since it uses as much as digits as its factorization.

206138935259 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3499200, while the sum is 53.

The spelling of 206138935259 in words is "two hundred six billion, one hundred thirty-eight million, nine hundred thirty-five thousand, two hundred fifty-nine".