129726732696 has 128 divisors (see below), whose sum is σ = 357830818560. Its totient is φ = 38864448000.

The previous prime is 129726732659. The next prime is 129726732841. The reversal of 129726732696 is 696237627921.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20181435 + ... + 20187861.

It is an arithmetic number, because the mean of its divisors is an integer number (2795553270).

Almost surely, 2^129726732696 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129726732696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178915409280).

129726732696 is an abundant number, since it is smaller than the sum of its proper divisors (228104085864).

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

129726732696 is a wasteful number, since it uses less digits than its factorization.

129726732696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7305 (or 7301 counting only the distinct ones).

The product of its digits is 20575296, while the sum is 60.

The spelling of 129726732696 in words is "one hundred twenty-nine billion, seven hundred twenty-six million, seven hundred thirty-two thousand, six hundred ninety-six".