206231476657 has 2 divisors, whose sum is σ = 206231476658. Its totient is φ = 206231476656.

The previous prime is 206231476601. The next prime is 206231476669. The reversal of 206231476657 is 756674132602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206166851136 + 64625521 = 454056^2 + 8039^2 .

It is a cyclic number.

It is not a de Polignac number, because 206231476657 - 2³⁵ = 171871738289 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 206231476657.

It is not a weakly prime, because it can be changed into another prime (206231476357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103115738328 + 103115738329.

It is an arithmetic number, because the mean of its divisors is an integer number (103115738329).

Almost surely, 2^206231476657 is an apocalyptic number.

It is an amenable number.

206231476657 is a deficient number, since it is larger than the sum of its proper divisors (1).

206231476657 is an equidigital number, since it uses as much as digits as its factorization.

206231476657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2540160, while the sum is 49.

The spelling of 206231476657 in words is "two hundred six billion, two hundred thirty-one million, four hundred seventy-six thousand, six hundred fifty-seven".