208872121065 has 8 divisors (see below), whose sum is σ = 334195393728. Its totient is φ = 111398464560.

The previous prime is 208872121037. The next prime is 208872121091. The reversal of 208872121065 is 560121278802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 208872121065 - 2⁵ = 208872121033 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6962404021 + ... + 6962404050.

It is an arithmetic number, because the mean of its divisors is an integer number (41774424216).

Almost surely, 2^208872121065 is an apocalyptic number.

It is an amenable number.

208872121065 is a deficient number, since it is larger than the sum of its proper divisors (125323272663).

208872121065 is a wasteful number, since it uses less digits than its factorization.

208872121065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13924808079.

The product of its (nonzero) digits is 107520, while the sum is 42.

Adding to 208872121065 its reverse (560121278802), we get a palindrome (768993399867).

The spelling of 208872121065 in words is "two hundred eight billion, eight hundred seventy-two million, one hundred twenty-one thousand, sixty-five".