129181009958 has 96 divisors (see below), whose sum is σ = 267792648480. Its totient is φ = 45936253440.

The previous prime is 129181009949. The next prime is 129181010003. The reversal of 129181009958 is 859900181921.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1195460 + ... + 1299032.

It is an arithmetic number, because the mean of its divisors is an integer number (2789506755).

Almost surely, 2^129181009958 is an apocalyptic number.

129181009958 is an abundant number, since it is smaller than the sum of its proper divisors (138611638522).

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

129181009958 is a wasteful number, since it uses less digits than its factorization.

129181009958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103702 (or 103695 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 53.

The spelling of 129181009958 in words is "one hundred twenty-nine billion, one hundred eighty-one million, nine thousand, nine hundred fifty-eight".