129628461784 has 16 divisors (see below), whose sum is σ = 243063661320. Its totient is φ = 64811485440.

The previous prime is 129628461779. The next prime is 129628461821. The reversal of 129628461784 is 487164826921.

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, 135094 + ... + 526789.

Almost surely, 2^129628461784 is an apocalyptic number.

It is an amenable number.

129628461784 is a deficient number, since it is larger than the sum of its proper divisors (113435199536).

129628461784 is a wasteful number, since it uses less digits than its factorization.

129628461784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686370 (or 686366 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 58.

The spelling of 129628461784 in words is "one hundred twenty-nine billion, six hundred twenty-eight million, four hundred sixty-one thousand, seven hundred eighty-four".