208653298541 has 18 divisors (see below), whose sum is σ = 217342043370. Its totient is φ = 200073706560.

The previous prime is 208653298537. The next prime is 208653298559. The reversal of 208653298541 is 145892356802.

It is a happy number.

208653298541 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 18286882441 + 190366416100 = 135229^2 + 436310^2 .

It is not a de Polignac number, because 208653298541 - 2² = 208653298537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208653298571) 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 17 ways as a sum of consecutive naturals, for example, 666623801 + ... + 666624113.

It is an arithmetic number, because the mean of its divisors is an integer number (12074557965).

Almost surely, 2^208653298541 is an apocalyptic number.

It is an amenable number.

208653298541 is a deficient number, since it is larger than the sum of its proper divisors (8688744829).

208653298541 is an frugal number, since it uses more digits than its factorization.

208653298541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1197 (or 613 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 53.

The spelling of 208653298541 in words is "two hundred eight billion, six hundred fifty-three million, two hundred ninety-eight thousand, five hundred forty-one".