129093656668 has 24 divisors (see below), whose sum is σ = 226163154560. Its totient is φ = 64475656560.

The previous prime is 129093656603. The next prime is 129093656669. The reversal of 129093656668 is 866656390921.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129093656669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21792355 + ... + 21798277.

Almost surely, 2^129093656668 is an apocalyptic number.

It is an amenable number.

129093656668 is a deficient number, since it is larger than the sum of its proper divisors (97069497892).

129093656668 is a wasteful number, since it uses less digits than its factorization.

129093656668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11017 (or 11015 counting only the distinct ones).

The product of its (nonzero) digits is 25194240, while the sum is 61.

The spelling of 129093656668 in words is "one hundred twenty-nine billion, ninety-three million, six hundred fifty-six thousand, six hundred sixty-eight".