208656545197 has 2 divisors, whose sum is σ = 208656545198. Its totient is φ = 208656545196.

The previous prime is 208656545171. The next prime is 208656545231. The reversal of 208656545197 is 791545656802.

It is a happy number.

208656545197 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., 186925657801 + 21730887396 = 432349^2 + 147414^2 .

It is a cyclic number.

It is not a de Polignac number, because 208656545197 - 2¹⁵ = 208656512429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208656545147) 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, 104328272598 + 104328272599.

It is an arithmetic number, because the mean of its divisors is an integer number (104328272599).

Almost surely, 2^208656545197 is an apocalyptic number.

It is an amenable number.

208656545197 is a deficient number, since it is larger than the sum of its proper divisors (1).

208656545197 is an equidigital number, since it uses as much as digits as its factorization.

208656545197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144000, while the sum is 58.

The spelling of 208656545197 in words is "two hundred eight billion, six hundred fifty-six million, five hundred forty-five thousand, one hundred ninety-seven".