129819686534 has 8 divisors (see below), whose sum is σ = 195053540808. Its totient is φ = 64801839600.

The previous prime is 129819686467. The next prime is 129819686537. The reversal of 129819686534 is 435686918921.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129819686537) 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, 54000332 + ... + 54002735.

It is an arithmetic number, because the mean of its divisors is an integer number (24381692601).

Almost surely, 2^129819686534 is an apocalyptic number.

129819686534 is a deficient number, since it is larger than the sum of its proper divisors (65233854274).

129819686534 is a wasteful number, since it uses less digits than its factorization.

129819686534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108003670.

The product of its digits is 22394880, while the sum is 62.

The spelling of 129819686534 in words is "one hundred twenty-nine billion, eight hundred nineteen million, six hundred eighty-six thousand, five hundred thirty-four".