129310018512 has 80 divisors (see below), whose sum is σ = 353400000000. Its totient is φ = 40629485952.

The previous prime is 129310018507. The next prime is 129310018561. The reversal of 129310018512 is 215810013921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 174762 + ... + 537737.

It is an arithmetic number, because the mean of its divisors is an integer number (4417500000).

Almost surely, 2^129310018512 is an apocalyptic number.

129310018512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

129310018512 is an abundant number, since it is smaller than the sum of its proper divisors (224089981488).

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

129310018512 is a wasteful number, since it uses less digits than its factorization.

129310018512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712728 (or 712722 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 33.

The spelling of 129310018512 in words is "one hundred twenty-nine billion, three hundred ten million, eighteen thousand, five hundred twelve".