129409497084 has 96 divisors (see below), whose sum is σ = 354234456576. Its totient is φ = 36000034560.

The previous prime is 129409497071. The next prime is 129409497089. The reversal of 129409497084 is 480794904921.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129409497089) 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, 1088494 + ... + 1201514.

It is an arithmetic number, because the mean of its divisors is an integer number (3689942256).

Almost surely, 2^129409497084 is an apocalyptic number.

129409497084 is a gapful number since it is divisible by the number (14) 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 129409497084, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177117228288).

129409497084 is an abundant number, since it is smaller than the sum of its proper divisors (224824959492).

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

129409497084 is a wasteful number, since it uses less digits than its factorization.

129409497084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113395 (or 113393 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 57.

The spelling of 129409497084 in words is "one hundred twenty-nine billion, four hundred nine million, four hundred ninety-seven thousand, eighty-four".