129866733344 has 72 divisors (see below), whose sum is σ = 263787022044. Its totient is φ = 62890560000.

The previous prime is 129866733343. The next prime is 129866733377. The reversal of 129866733344 is 443337668921.

It can be written as a sum of positive squares in 2 ways, for example, as 127035216400 + 2831516944 = 356420^2 + 53212^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 129866733344.

It is not an unprimeable number, because it can be changed into a prime (129866733343) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 74592314 + ... + 74594054.

Almost surely, 2^129866733344 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 129866733344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131893511022).

129866733344 is an abundant number, since it is smaller than the sum of its proper divisors (133920288700).

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

129866733344 is an equidigital number, since it uses as much as digits as its factorization.

129866733344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2290 (or 2031 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 56.

The spelling of 129866733344 in words is "one hundred twenty-nine billion, eight hundred sixty-six million, seven hundred thirty-three thousand, three hundred forty-four".