208868811136 has 16 divisors (see below), whose sum is σ = 416105834940. Its totient is φ = 104434405504.

The previous prime is 208868811133. The next prime is 208868811163. The reversal of 208868811136 is 631118868802.

It is a tau number, because it is divible by the number of its divisors (16).

It is a super-2 number, since 2×208868811136² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208868811133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 815893666 + ... + 815893921.

Almost surely, 2^208868811136 is an apocalyptic number.

It is an amenable number.

208868811136 is a deficient number, since it is larger than the sum of its proper divisors (207237023804).

208868811136 is an equidigital number, since it uses as much as digits as its factorization.

208868811136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1631787601 (or 1631787589 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 52.

The spelling of 208868811136 in words is "two hundred eight billion, eight hundred sixty-eight million, eight hundred eleven thousand, one hundred thirty-six".