129568629844 has 24 divisors (see below), whose sum is σ = 232843501800. Its totient is φ = 63049643520.

The previous prime is 129568629797. The next prime is 129568629871. The reversal of 129568629844 is 448926865921.

It can be written as a sum of positive squares in 4 ways, for example, as 391644100 + 129176985744 = 19790^2 + 359412^2 .

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 898759 + ... + 1032910.

It is an arithmetic number, because the mean of its divisors is an integer number (9701812575).

Almost surely, 2^129568629844 is an apocalyptic number.

It is an amenable number.

129568629844 is a deficient number, since it is larger than the sum of its proper divisors (103274871956).

129568629844 is a wasteful number, since it uses less digits than its factorization.

129568629844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1932123 (or 1932121 counting only the distinct ones).

The product of its digits is 59719680, while the sum is 64.

The spelling of 129568629844 in words is "one hundred twenty-nine billion, five hundred sixty-eight million, six hundred twenty-nine thousand, eight hundred forty-four".