129554929928 has 16 divisors (see below), whose sum is σ = 250751477760. Its totient is φ = 62687869200.

The previous prime is 129554929901. The next prime is 129554929997. The reversal of 129554929928 is 829929455921.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 261199208 + ... + 261199703.

It is an arithmetic number, because the mean of its divisors is an integer number (15671967360).

Almost surely, 2^129554929928 is an apocalyptic number.

It is an amenable number.

129554929928 is a deficient number, since it is larger than the sum of its proper divisors (121196547832).

129554929928 is a wasteful number, since it uses less digits than its factorization.

129554929928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522398948 (or 522398944 counting only the distinct ones).

The product of its digits is 41990400, while the sum is 65.

The spelling of 129554929928 in words is "one hundred twenty-nine billion, five hundred fifty-four million, nine hundred twenty-nine thousand, nine hundred twenty-eight".