129112664857 has 12 divisors (see below), whose sum is σ = 142038575728. Its totient is φ = 117274786200.

The previous prime is 129112664831. The next prime is 129112664873. The reversal of 129112664857 is 758466211921.

It is not a de Polignac number, because 129112664857 - 2¹⁹ = 129112140569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129112664357) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 313923 + ... + 597304.

Almost surely, 2^129112664857 is an apocalyptic number.

It is an amenable number.

129112664857 is a deficient number, since it is larger than the sum of its proper divisors (12925910871).

129112664857 is a wasteful number, since it uses less digits than its factorization.

129112664857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912420 (or 912409 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 52.

The spelling of 129112664857 in words is "one hundred twenty-nine billion, one hundred twelve million, six hundred sixty-four thousand, eight hundred fifty-seven".