208881949765241 has 2 divisors, whose sum is σ = 208881949765242. Its totient is φ = 208881949765240.

The previous prime is 208881949765219. The next prime is 208881949765243. The reversal of 208881949765241 is 142567949188802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 207403087038016 + 1478862727225 = 14401496^2 + 1216085^2 .

It is a cyclic number.

It is not a de Polignac number, because 208881949765241 - 2¹⁰ = 208881949764217 is a prime.

Together with 208881949765243, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (208881949765243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104440974882620 + 104440974882621.

It is an arithmetic number, because the mean of its divisors is an integer number (104440974882621).

Almost surely, 2^{208881949765241} is an apocalyptic number.

It is an amenable number.

208881949765241 is a deficient number, since it is larger than the sum of its proper divisors (1).

208881949765241 is an equidigital number, since it uses as much as digits as its factorization.

208881949765241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 557383680, while the sum is 74.

The spelling of 208881949765241 in words is "two hundred eight trillion, eight hundred eighty-one billion, nine hundred forty-nine million, seven hundred sixty-five thousand, two hundred forty-one".