129456471447 has 12 divisors (see below), whose sum is σ = 189783617400. Its totient is φ = 85016189808.

The previous prime is 129456471413. The next prime is 129456471493. The reversal of 129456471447 is 744174654921.

It is a happy number.

129456471447 is a `hidden beast` number, since 1 + 2 + 9 + 4 + 564 + 71 + 4 + 4 + 7 = 666.

It is not a de Polignac number, because 129456471447 - 2¹¹ = 129456469399 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129456471393 and 129456471402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129456471407) 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, 107343072 + ... + 107344277.

It is an arithmetic number, because the mean of its divisors is an integer number (15815301450).

Almost surely, 2^129456471447 is an apocalyptic number.

129456471447 is a deficient number, since it is larger than the sum of its proper divisors (60327145953).

129456471447 is a wasteful number, since it uses less digits than its factorization.

129456471447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214687422 (or 214687419 counting only the distinct ones).

The product of its digits is 6773760, while the sum is 54.

The spelling of 129456471447 in words is "one hundred twenty-nine billion, four hundred fifty-six million, four hundred seventy-one thousand, four hundred forty-seven".