208234583561 has 16 divisors (see below), whose sum is σ = 215490201600. Its totient is φ = 201013263360.

The previous prime is 208234583551. The next prime is 208234583563. The reversal of 208234583561 is 165385432802.

It is a cyclic number.

It is not a de Polignac number, because 208234583561 - 2¹⁸ = 208234321417 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208234583563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23007365 + ... + 23016413.

It is an arithmetic number, because the mean of its divisors is an integer number (13468137600).

Almost surely, 2^208234583561 is an apocalyptic number.

It is an amenable number.

208234583561 is a deficient number, since it is larger than the sum of its proper divisors (7255618039).

208234583561 is a wasteful number, since it uses less digits than its factorization.

208234583561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10856.

The product of its (nonzero) digits is 1382400, while the sum is 47.

The spelling of 208234583561 in words is "two hundred eight billion, two hundred thirty-four million, five hundred eighty-three thousand, five hundred sixty-one".