129159927173998 has 24 divisors (see below), whose sum is σ = 225371508441912. Its totient is φ = 55354103424144.

The previous prime is 129159927173983. The next prime is 129159927173999. The reversal of 129159927173998 is 899371729951921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129159927173999) 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, 38985661 + ... + 42168727.

It is an arithmetic number, because the mean of its divisors is an integer number (9390479518413).

Almost surely, 2^{129159927173998} is an apocalyptic number.

129159927173998 is a deficient number, since it is larger than the sum of its proper divisors (96211581267914).

129159927173998 is a wasteful number, since it uses less digits than its factorization.

129159927173998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3597136 (or 3597129 counting only the distinct ones).

The product of its digits is 1388832480, while the sum is 82.

The spelling of 129159927173998 in words is "one hundred twenty-nine trillion, one hundred fifty-nine billion, nine hundred twenty-seven million, one hundred seventy-three thousand, nine hundred ninety-eight".