129555196 has 6 divisors (see below), whose sum is σ = 226721600. Its totient is φ = 64777596.

The previous prime is 129555193. The next prime is 129555197. The reversal of 129555196 is 691555921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129555193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16194396 + ... + 16194403.

Almost surely, 2^129555196 is an apocalyptic number.

It is an amenable number.

129555196 is a deficient number, since it is larger than the sum of its proper divisors (97166404).

129555196 is a wasteful number, since it uses less digits than its factorization.

129555196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32388803 (or 32388801 counting only the distinct ones).

The product of its digits is 121500, while the sum is 43.

The square root of 129555196 is about 11382.2315913884. The cubic root of 129555196 is about 506.0012758590.

The spelling of 129555196 in words is "one hundred twenty-nine million, five hundred fifty-five thousand, one hundred ninety-six".