129544998227478 has 32 divisors (see below), whose sum is σ = 287878294476000. Its totient is φ = 43181587980288.

The previous prime is 129544998227473. The next prime is 129544998227497. The reversal of 129544998227478 is 874722899445921.

129544998227478 is a `hidden beast` number, since 1 + 2 + 9 + 5 + 4 + 49 + 9 + 82 + 27 + 478 = 666.

129544998227478 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 129544998227397 and 129544998227406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129544998227473) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33280150 + ... + 36968342.

It is an arithmetic number, because the mean of its divisors is an integer number (8996196702375).

Almost surely, 2^{129544998227478} is an apocalyptic number.

129544998227478 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

129544998227478 is an abundant number, since it is smaller than the sum of its proper divisors (158333296248522).

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

129544998227478 is a wasteful number, since it uses less digits than its factorization.

129544998227478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4338653 (or 4338647 counting only the distinct ones).

The product of its digits is 5852528640, while the sum is 81.

The spelling of 129544998227478 in words is "one hundred twenty-nine trillion, five hundred forty-four billion, nine hundred ninety-eight million, two hundred twenty-seven thousand, four hundred seventy-eight".