208317608053 has 4 divisors (see below), whose sum is σ = 208337528448. Its totient is φ = 208297687660.

The previous prime is 208317608011. The next prime is 208317608069. The reversal of 208317608053 is 350806713802.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 208317608053 - 2¹⁷ = 208317476981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208317608453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9944503 + ... + 9965428.

It is an arithmetic number, because the mean of its divisors is an integer number (52084382112).

Almost surely, 2^208317608053 is an apocalyptic number.

It is an amenable number.

208317608053 is a deficient number, since it is larger than the sum of its proper divisors (19920395).

208317608053 is a wasteful number, since it uses less digits than its factorization.

208317608053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19920394.

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 208317608053 in words is "two hundred eight billion, three hundred seventeen million, six hundred eight thousand, fifty-three".