133681608128 has 28 divisors (see below), whose sum is σ = 279236256360. Its totient is φ = 63322866432.

The previous prime is 133681608091. The next prime is 133681608133. The reversal of 133681608128 is 821806186331.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54966551 + ... + 54968982.

Almost surely, 2^133681608128 is an apocalyptic number.

It is an amenable number.

133681608128 is an abundant number, since it is smaller than the sum of its proper divisors (145554648232).

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

133681608128 is a wasteful number, since it uses less digits than its factorization.

133681608128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109935564 (or 109935554 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 47.

The spelling of 133681608128 in words is "one hundred thirty-three billion, six hundred eighty-one million, six hundred eight thousand, one hundred twenty-eight".