129368677720 has 32 divisors (see below), whose sum is σ = 292603518720. Its totient is φ = 51476538880.

The previous prime is 129368677717. The next prime is 129368677799. The reversal of 129368677720 is 27776863921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8458897 + ... + 8474176.

It is an arithmetic number, because the mean of its divisors is an integer number (9143859960).

Almost surely, 2^129368677720 is an apocalyptic number.

129368677720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129368677720 is an abundant number, since it is smaller than the sum of its proper divisors (163234841000).

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

129368677720 is a wasteful number, since it uses less digits than its factorization.

129368677720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16933275 (or 16933271 counting only the distinct ones).

The product of its (nonzero) digits is 10668672, while the sum is 58.

The spelling of 129368677720 in words is "one hundred twenty-nine billion, three hundred sixty-eight million, six hundred seventy-seven thousand, seven hundred twenty".