208694944128 has 128 divisors (see below), whose sum is σ = 640314253440. Its totient is φ = 59520819200.

The previous prime is 208694944109. The next prime is 208694944153. The reversal of 208694944128 is 821449496802.

It is a happy number.

208694944128 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1381338 + ... + 1524953.

It is an arithmetic number, because the mean of its divisors is an integer number (5002455105).

Almost surely, 2^208694944128 is an apocalyptic number.

It is an amenable number.

208694944128 is an abundant number, since it is smaller than the sum of its proper divisors (431619309312).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

208694944128 is a wasteful number, since it uses less digits than its factorization.

208694944128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2906336 (or 2906324 counting only the distinct ones).

The product of its (nonzero) digits is 7962624, while the sum is 57.

The spelling of 208694944128 in words is "two hundred eight billion, six hundred ninety-four million, nine hundred forty-four thousand, one hundred twenty-eight".