129757730668 has 24 divisors (see below), whose sum is σ = 228927227760. Its totient is φ = 64350461760.

The previous prime is 129757730647. The next prime is 129757730681. The reversal of 129757730668 is 866037757921.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 971098 + ... + 1096606.

It is an arithmetic number, because the mean of its divisors is an integer number (9538634490).

Almost surely, 2^129757730668 is an apocalyptic number.

It is an amenable number.

129757730668 is a deficient number, since it is larger than the sum of its proper divisors (99169497092).

129757730668 is a wasteful number, since it uses less digits than its factorization.

129757730668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127617 (or 127615 counting only the distinct ones).

The product of its (nonzero) digits is 26671680, while the sum is 61.

The spelling of 129757730668 in words is "one hundred twenty-nine billion, seven hundred fifty-seven million, seven hundred thirty thousand, six hundred sixty-eight".