129534981018 has 16 divisors (see below), whose sum is σ = 259126743360. Its totient is φ = 43168863456.

The previous prime is 129534981013. The next prime is 129534981029. The reversal of 129534981018 is 810189435921.

It is a super-2 number, since 2×129534981018² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (129534981013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2336203 + ... + 2391006.

It is an arithmetic number, because the mean of its divisors is an integer number (16195421460).

Almost surely, 2^129534981018 is an apocalyptic number.

129534981018 is an abundant number, since it is smaller than the sum of its proper divisors (129591762342).

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

129534981018 is a wasteful number, since it uses less digits than its factorization.

129534981018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4731781.

The product of its (nonzero) digits is 622080, while the sum is 51.

The spelling of 129534981018 in words is "one hundred twenty-nine billion, five hundred thirty-four million, nine hundred eighty-one thousand, eighteen".