129985554 has 16 divisors (see below), whose sum is σ = 260084160. Its totient is φ = 43309680.

The previous prime is 129985549. The next prime is 129985567. The reversal of 129985554 is 455589921.

129985554 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21219 + ... + 26649.

It is an arithmetic number, because the mean of its divisors is an integer number (16255260).

Almost surely, 2^129985554 is an apocalyptic number.

129985554 is an abundant number, since it is smaller than the sum of its proper divisors (130098606).

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

129985554 is a wasteful number, since it uses less digits than its factorization.

129985554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9425.

The product of its digits is 648000, while the sum is 48.

The square root of 129985554 is about 11401.1207343840. The cubic root of 129985554 is about 506.5609369833.

The spelling of 129985554 in words is "one hundred twenty-nine million, nine hundred eighty-five thousand, five hundred fifty-four".