129896809744 has 135 divisors (see below), whose sum is σ = 283431198063. Its totient is φ = 57642853632.

The previous prime is 129896809741. The next prime is 129896809747. The reversal of 129896809744 is 447908698921.

The square root of 129896809744 is 360412.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (129896809741) and next prime (129896809747).

It can be written as a sum of positive squares in 4 ways, for example, as 16656483600 + 113240326144 = 129060^2 + 336512^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 129896809744.

It is not an unprimeable number, because it can be changed into a prime (129896809741) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 543501177 + ... + 543501415.

Almost surely, 2^129896809744 is an apocalyptic number.

129896809744 is the 360412-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129896809744

129896809744 is an abundant number, since it is smaller than the sum of its proper divisors (153534388319).

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

129896809744 is an equidigital number, since it uses as much as digits as its factorization.

129896809744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570 (or 283 counting only the distinct ones).

The product of its (nonzero) digits is 62705664, while the sum is 67.

The spelling of 129896809744 in words is "one hundred twenty-nine billion, eight hundred ninety-six million, eight hundred nine thousand, seven hundred forty-four".