129687500000000 has 270 divisors, whose sum is σ = 327484130848644. Its totient is φ = 51250000000000.

The previous prime is 129687499999973. The next prime is 129687500000011. The reversal of 129687500000000 is 5786921.

It is a self number, because there is not a number n which added to its sum of digits gives 129687500000000.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 1562499999959 + ... + 1562500000041.

Almost surely, 2^{129687500000000} is an apocalyptic number.

129687500000000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129687500000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163742065424322).

129687500000000 is an abundant number, since it is smaller than the sum of its proper divisors (197796630848644).

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

129687500000000 is an frugal number, since it uses more digits than its factorization.

129687500000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 38.

Adding to 129687500000000 its reverse (5786921), we get a palindrome (129687505786921).

The spelling of 129687500000000 in words is "one hundred twenty-nine trillion, six hundred eighty-seven billion, five hundred million", and thus it is an aban number.