208416774823 has 2 divisors, whose sum is σ = 208416774824. Its totient is φ = 208416774822.

The previous prime is 208416774821. The next prime is 208416774851. The reversal of 208416774823 is 328477614802.

208416774823 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 is a cyclic number.

It is not a de Polignac number, because 208416774823 - 2¹ = 208416774821 is a prime.

Together with 208416774821, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208416774821) 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, 104208387411 + 104208387412.

It is an arithmetic number, because the mean of its divisors is an integer number (104208387412).

Almost surely, 2^208416774823 is an apocalyptic number.

208416774823 is a deficient number, since it is larger than the sum of its proper divisors (1).

208416774823 is an equidigital number, since it uses as much as digits as its factorization.

208416774823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3612672, while the sum is 52.

The spelling of 208416774823 in words is "two hundred eight billion, four hundred sixteen million, seven hundred seventy-four thousand, eight hundred twenty-three".