208858810028069 has 2 divisors, whose sum is σ = 208858810028070. Its totient is φ = 208858810028068.

The previous prime is 208858810028059. The next prime is 208858810028147. The reversal of 208858810028069 is 960820018858802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136413943811044 + 72444866217025 = 11679638^2 + 8511455^2 .

It is a cyclic number.

It is not a de Polignac number, because 208858810028069 - 2¹⁶ = 208858809962533 is a prime.

It is a super-2 number, since 2×208858810028069² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 208858810027996 and 208858810028014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208858810028009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104429405014034 + 104429405014035.

It is an arithmetic number, because the mean of its divisors is an integer number (104429405014035).

Almost surely, 2^{208858810028069} is an apocalyptic number.

It is an amenable number.

208858810028069 is a deficient number, since it is larger than the sum of its proper divisors (1).

208858810028069 is an equidigital number, since it uses as much as digits as its factorization.

208858810028069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35389440, while the sum is 65.

The spelling of 208858810028069 in words is "two hundred eight trillion, eight hundred fifty-eight billion, eight hundred ten million, twenty-eight thousand, sixty-nine".