129525651112728 has 128 divisors (see below), whose sum is σ = 360356233144320. Its totient is φ = 38527267783680.

The previous prime is 129525651112723. The next prime is 129525651112747. The reversal of 129525651112728 is 827211156525921.

It is a super-2 number, since 2×129525651112728² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129525651112723) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1916551 + ... + 16208777.

It is an arithmetic number, because the mean of its divisors is an integer number (2815283071440).

Almost surely, 2^{129525651112728} 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 129525651112728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180178116572160).

129525651112728 is an abundant number, since it is smaller than the sum of its proper divisors (230830582031592).

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

129525651112728 is a wasteful number, since it uses less digits than its factorization.

129525651112728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14293217 (or 14293213 counting only the distinct ones).

The product of its digits is 6048000, while the sum is 57.

The spelling of 129525651112728 in words is "one hundred twenty-nine trillion, five hundred twenty-five billion, six hundred fifty-one million, one hundred twelve thousand, seven hundred twenty-eight".