129946215678 has 8 divisors (see below), whose sum is σ = 259892431368. Its totient is φ = 43315405224.

The previous prime is 129946215677. The next prime is 129946215703. The reversal of 129946215678 is 876512649921.

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

129946215678 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129946215677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10828851301 + ... + 10828851312.

It is an arithmetic number, because the mean of its divisors is an integer number (32486553921).

Almost surely, 2^129946215678 is an apocalyptic number.

129946215678 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

129946215678 is a wasteful number, since it uses less digits than its factorization.

129946215678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21657702618.

The product of its digits is 13063680, while the sum is 60.

The spelling of 129946215678 in words is "one hundred twenty-nine billion, nine hundred forty-six million, two hundred fifteen thousand, six hundred seventy-eight".