129291740352 has 112 divisors (see below), whose sum is σ = 380206808800. Its totient is φ = 43084431360.

The previous prime is 129291740339. The next prime is 129291740377. The reversal of 129291740352 is 253047192921.

129291740352 is a `hidden beast` number, since 1 + 2 + 9 + 291 + 7 + 4 + 0 + 352 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 129291740298 and 129291740307.

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, 7125852 + ... + 7143972.

It is an arithmetic number, because the mean of its divisors is an integer number (3394703650).

Almost surely, 2^129291740352 is an apocalyptic number.

129291740352 is a gapful number since it is divisible by the number (12) 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 129291740352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190103404400).

129291740352 is an abundant number, since it is smaller than the sum of its proper divisors (250915068448).

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

129291740352 is a wasteful number, since it uses less digits than its factorization.

129291740352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22271 (or 22255 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The spelling of 129291740352 in words is "one hundred twenty-nine billion, two hundred ninety-one million, seven hundred forty thousand, three hundred fifty-two".