129527387820 has 96 divisors (see below), whose sum is σ = 403037107200. Its totient is φ = 34535236032.

The previous prime is 129527387789. The next prime is 129527387827. The reversal of 129527387820 is 28783725921.

129527387820 is a `hidden beast` number, since 1 + 2 + 9 + 527 + 38 + 7 + 82 + 0 = 666.

129527387820 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (129527387827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4401997 + ... + 4431323.

It is an arithmetic number, because the mean of its divisors is an integer number (4198303200).

Almost surely, 2^129527387820 is an apocalyptic number.

129527387820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129527387820 is an abundant number, since it is smaller than the sum of its proper divisors (273509719380).

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

129527387820 is a wasteful number, since it uses less digits than its factorization.

129527387820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37524 (or 37516 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 54.

The spelling of 129527387820 in words is "one hundred twenty-nine billion, five hundred twenty-seven million, three hundred eighty-seven thousand, eight hundred twenty".