208427740559 has 4 divisors (see below), whose sum is σ = 220688195904. Its totient is φ = 196167285216.

The previous prime is 208427740513. The next prime is 208427740583. The reversal of 208427740559 is 955047724802.

208427740559 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 208427740559 - 2¹⁶ = 208427675023 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 208427740559.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208427710559) 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 in 3 ways as a sum of consecutive naturals, for example, 6130227647 + ... + 6130227680.

It is an arithmetic number, because the mean of its divisors is an integer number (55172048976).

Almost surely, 2^208427740559 is an apocalyptic number.

208427740559 is a deficient number, since it is larger than the sum of its proper divisors (12260455345).

208427740559 is a wasteful number, since it uses less digits than its factorization.

208427740559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12260455344.

The product of its (nonzero) digits is 5644800, while the sum is 53.

The spelling of 208427740559 in words is "two hundred eight billion, four hundred twenty-seven million, seven hundred forty thousand, five hundred fifty-nine".