206630243489 has 2 divisors, whose sum is σ = 206630243490. Its totient is φ = 206630243488.

The previous prime is 206630243423. The next prime is 206630243539. The reversal of 206630243489 is 984342036602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179938852864 + 26691390625 = 424192^2 + 163375^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206630243489 is a prime.

It is not a weakly prime, because it can be changed into another prime (206650243489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103315121744 + 103315121745.

It is an arithmetic number, because the mean of its divisors is an integer number (103315121745).

Almost surely, 2^206630243489 is an apocalyptic number.

It is an amenable number.

206630243489 is a deficient number, since it is larger than the sum of its proper divisors (1).

206630243489 is an equidigital number, since it uses as much as digits as its factorization.

206630243489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1492992, while the sum is 47.

The spelling of 206630243489 in words is "two hundred six billion, six hundred thirty million, two hundred forty-three thousand, four hundred eighty-nine".