129781678071 has 8 divisors (see below), whose sum is σ = 176307185520. Its totient is φ = 84888644672.

The previous prime is 129781678063. The next prime is 129781678093. The reversal of 129781678071 is 170876187921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 129781678071 - 2³ = 129781678063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129781678771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 408118326 + ... + 408118643.

It is an arithmetic number, because the mean of its divisors is an integer number (22038398190).

Almost surely, 2^129781678071 is an apocalyptic number.

129781678071 is a deficient number, since it is larger than the sum of its proper divisors (46525507449).

129781678071 is an equidigital number, since it uses as much as digits as its factorization.

129781678071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816237025.

The product of its (nonzero) digits is 2370816, while the sum is 57.

The spelling of 129781678071 in words is "one hundred twenty-nine billion, seven hundred eighty-one million, six hundred seventy-eight thousand, seventy-one".