208488909136 has 10 divisors (see below), whose sum is σ = 403947261482. Its totient is φ = 104244454560.

The previous prime is 208488909133. The next prime is 208488909149. The reversal of 208488909136 is 631909884802.

It can be written as a sum of positive squares in only one way, i.e., 205118410000 + 3370499136 = 452900^2 + 58056^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208488909131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6515278395 + ... + 6515278426.

Almost surely, 2^208488909136 is an apocalyptic number.

It is an amenable number.

208488909136 is a deficient number, since it is larger than the sum of its proper divisors (195458352346).

208488909136 is a wasteful number, since it uses less digits than its factorization.

208488909136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13030556829 (or 13030556823 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 58.

The spelling of 208488909136 in words is "two hundred eight billion, four hundred eighty-eight million, nine hundred nine thousand, one hundred thirty-six".