129555418804 has 24 divisors (see below), whose sum is σ = 263502550080. Its totient is φ = 54582669696.

The previous prime is 129555418787. The next prime is 129555418901. The reversal of 129555418804 is 408814555921.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39210037 + ... + 39213340.

It is an arithmetic number, because the mean of its divisors is an integer number (10979272920).

Almost surely, 2^129555418804 is an apocalyptic number.

129555418804 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

129555418804 is an abundant number, since it is smaller than the sum of its proper divisors (133947131276).

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

129555418804 is a wasteful number, since it uses less digits than its factorization.

129555418804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78423447 (or 78423445 counting only the distinct ones).

The product of its (nonzero) digits is 2304000, while the sum is 52.

The spelling of 129555418804 in words is "one hundred twenty-nine billion, five hundred fifty-five million, four hundred eighteen thousand, eight hundred four".