129443945026216 has 16 divisors (see below), whose sum is σ = 242734218520500. Its totient is φ = 64714820087424.

The previous prime is 129443945026213. The next prime is 129443945026223. The reversal of 129443945026216 is 612620549344921.

It can be written as a sum of positive squares in 2 ways, for example, as 126284687621316 + 3159257404900 = 11237646^2 + 1777430^2 .

It is not an unprimeable number, because it can be changed into a prime (129443945026211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 893976295 + ... + 894121078.

Almost surely, 2^{129443945026216} is an apocalyptic number.

It is an amenable number.

129443945026216 is a deficient number, since it is larger than the sum of its proper divisors (113290273494284).

129443945026216 is a wasteful number, since it uses less digits than its factorization.

129443945026216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1788106428 (or 1788106424 counting only the distinct ones).

The product of its (nonzero) digits is 22394880, while the sum is 58.

The spelling of 129443945026216 in words is "one hundred twenty-nine trillion, four hundred forty-three billion, nine hundred forty-five million, twenty-six thousand, two hundred sixteen".