206450221660259 has 2 divisors, whose sum is σ = 206450221660260. Its totient is φ = 206450221660258.

The previous prime is 206450221660253. The next prime is 206450221660391. The reversal of 206450221660259 is 952066122054602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 206450221660259 - 2³⁶ = 206381502183523 is a prime.

It is not a weakly prime, because it can be changed into another prime (206450221660253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103225110830129 + 103225110830130.

It is an arithmetic number, because the mean of its divisors is an integer number (103225110830130).

Almost surely, 2^{206450221660259} is an apocalyptic number.

206450221660259 is a deficient number, since it is larger than the sum of its proper divisors (1).

206450221660259 is an equidigital number, since it uses as much as digits as its factorization.

206450221660259 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3110400, while the sum is 50.

The spelling of 206450221660259 in words is "two hundred six trillion, four hundred fifty billion, two hundred twenty-one million, six hundred sixty thousand, two hundred fifty-nine".