129275750000 has 140 divisors (see below), whose sum is σ = 314161603680. Its totient is φ = 51532800000.

The previous prime is 129275749991. The next prime is 129275750039. The reversal of 129275750000 is 57572921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 91749296 + ... + 91750704.

Almost surely, 2^129275750000 is an apocalyptic number.

129275750000 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 129275750000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157080801840).

129275750000 is an abundant number, since it is smaller than the sum of its proper divisors (184885853680).

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

129275750000 is an frugal number, since it uses more digits than its factorization.

129275750000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1814 (or 1783 counting only the distinct ones).

The product of its (nonzero) digits is 44100, while the sum is 38.

The spelling of 129275750000 in words is "one hundred twenty-nine billion, two hundred seventy-five million, seven hundred fifty thousand".