129664158 has 16 divisors (see below), whose sum is σ = 279276816. Its totient is φ = 39896640.

The previous prime is 129664147. The next prime is 129664217. The reversal of 129664158 is 851466921.

It is a congruent number.

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, 831103 + ... + 831258.

It is an arithmetic number, because the mean of its divisors is an integer number (17454801).

Almost surely, 2^129664158 is an apocalyptic number.

129664158 is an abundant number, since it is smaller than the sum of its proper divisors (149612658).

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

129664158 is a wasteful number, since it uses less digits than its factorization.

129664158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1662379.

The product of its digits is 103680, while the sum is 42.

The square root of 129664158 is about 11387.0170808689. The cubic root of 129664158 is about 506.1430930482.

The spelling of 129664158 in words is "one hundred twenty-nine million, six hundred sixty-four thousand, one hundred fifty-eight".