129998818183218 has 64 divisors (see below), whose sum is σ = 264711675535104. Its totient is φ = 42549712128000.

The previous prime is 129998818183217. The next prime is 129998818183231. The reversal of 129998818183218 is 812381818899921.

It is not an unprimeable number, because it can be changed into a prime (129998818183217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2134141530 + ... + 2134202442.

It is an arithmetic number, because the mean of its divisors is an integer number (4136119930236).

Almost surely, 2^{129998818183218} is an apocalyptic number.

129998818183218 is an abundant number, since it is smaller than the sum of its proper divisors (134712857351886).

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

129998818183218 is a wasteful number, since it uses less digits than its factorization.

129998818183218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70851.

The product of its digits is 286654464, while the sum is 78.

The spelling of 129998818183218 in words is "one hundred twenty-nine trillion, nine hundred ninety-eight billion, eight hundred eighteen million, one hundred eighty-three thousand, two hundred eighteen".