129901775322916 has 81 divisors (see below), whose sum is σ = 243975092225907. Its totient is φ = 60506761324800.

The previous prime is 129901775322889. The next prime is 129901775322931. The reversal of 129901775322916 is 619223577109921.

The square root of 129901775322916 is 11397446.

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

129901775322916 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 77358181622500 + 52543593700416 = 8795350^2 + 7248696^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 39138827905 + ... + 39138831223.

Almost surely, 2^{129901775322916} is an apocalyptic number.

129901775322916 is the 11397446-th square number.

It is an amenable number.

129901775322916 is a deficient number, since it is larger than the sum of its proper divisors (114073316902991).

129901775322916 is an frugal number, since it uses more digits than its factorization.

129901775322916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6878 (or 3439 counting only the distinct ones).

The product of its (nonzero) digits is 25719120, while the sum is 64.

The spelling of 129901775322916 in words is "one hundred twenty-nine trillion, nine hundred one billion, seven hundred seventy-five million, three hundred twenty-two thousand, nine hundred sixteen".