208741225541 has 2 divisors, whose sum is σ = 208741225542. Its totient is φ = 208741225540.

The previous prime is 208741225513. The next prime is 208741225549. The reversal of 208741225541 is 145522147802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179885408641 + 28855816900 = 424129^2 + 169870^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-208741225541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208741225549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104370612770 + 104370612771.

It is an arithmetic number, because the mean of its divisors is an integer number (104370612771).

Almost surely, 2^208741225541 is an apocalyptic number.

It is an amenable number.

208741225541 is a deficient number, since it is larger than the sum of its proper divisors (1).

208741225541 is an equidigital number, since it uses as much as digits as its factorization.

208741225541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 179200, while the sum is 41.

The spelling of 208741225541 in words is "two hundred eight billion, seven hundred forty-one million, two hundred twenty-five thousand, five hundred forty-one".