129127046428 has 12 divisors (see below), whose sum is σ = 226770822040. Its totient is φ = 64335382992.

The previous prime is 129127046369. The next prime is 129127046491. The reversal of 129127046428 is 824640721921.

It is a congruent number.

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, 57033783 + ... + 57036046.

Almost surely, 2^129127046428 is an apocalyptic number.

It is an amenable number.

129127046428 is a deficient number, since it is larger than the sum of its proper divisors (97643775612).

129127046428 is a wasteful number, since it uses less digits than its factorization.

129127046428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114070116 (or 114070114 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 46.

The spelling of 129127046428 in words is "one hundred twenty-nine billion, one hundred twenty-seven million, forty-six thousand, four hundred twenty-eight".