206601461989649 has 2 divisors, whose sum is σ = 206601461989650. Its totient is φ = 206601461989648.

The previous prime is 206601461989633. The next prime is 206601461989691. The reversal of 206601461989649 is 946989164106602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136865267317249 + 69736194672400 = 11698943^2 + 8350820^2 .

It is a cyclic number.

It is not a de Polignac number, because 206601461989649 - 2⁴ = 206601461989633 is a prime.

It is not a weakly prime, because it can be changed into another prime (206601461989609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103300730994824 + 103300730994825.

It is an arithmetic number, because the mean of its divisors is an integer number (103300730994825).

Almost surely, 2^{206601461989649} is an apocalyptic number.

It is an amenable number.

206601461989649 is a deficient number, since it is larger than the sum of its proper divisors (1).

206601461989649 is an equidigital number, since it uses as much as digits as its factorization.

206601461989649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241864704, while the sum is 71.

The spelling of 206601461989649 in words is "two hundred six trillion, six hundred one billion, four hundred sixty-one million, nine hundred eighty-nine thousand, six hundred forty-nine".