129918560900 has 36 divisors (see below), whose sum is σ = 287921655168. Its totient is φ = 50861732640.

The previous prime is 129918560887. The next prime is 129918560903. The reversal of 129918560900 is 9065819921.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is not an unprimeable number, because it can be changed into a prime (129918560903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13816424 + ... + 13825823.

Almost surely, 2^129918560900 is an apocalyptic number.

129918560900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129918560900 is an abundant number, since it is smaller than the sum of its proper divisors (158003094268).

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

129918560900 is a wasteful number, since it uses less digits than its factorization.

129918560900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27642308 (or 27642301 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 50.

The spelling of 129918560900 in words is "one hundred twenty-nine billion, nine hundred eighteen million, five hundred sixty thousand, nine hundred".