206795554321 has 2 divisors, whose sum is σ = 206795554322. Its totient is φ = 206795554320.

The previous prime is 206795554313. The next prime is 206795554379. The reversal of 206795554321 is 123455597602.

206795554321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 191410625025 + 15384929296 = 437505^2 + 124036^2 .

It is a cyclic number.

It is not a de Polignac number, because 206795554321 - 2³ = 206795554313 is a prime.

It is not a weakly prime, because it can be changed into another prime (206795555321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103397777160 + 103397777161.

It is an arithmetic number, because the mean of its divisors is an integer number (103397777161).

Almost surely, 2^206795554321 is an apocalyptic number.

It is an amenable number.

206795554321 is a deficient number, since it is larger than the sum of its proper divisors (1).

206795554321 is an equidigital number, since it uses as much as digits as its factorization.

206795554321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268000, while the sum is 49.

The spelling of 206795554321 in words is "two hundred six billion, seven hundred ninety-five million, five hundred fifty-four thousand, three hundred twenty-one".