129065592049 has 9 divisors (see below), whose sum is σ = 130392779521. Its totient is φ = 127751789200.

The previous prime is 129065591959. The next prime is 129065592079. The reversal of 129065592049 is 940295560921.

The square root of 129065592049 is 359257.

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

It can be written as a sum of positive squares in 4 ways, for example, as 3205258225 + 125860333824 = 56615^2 + 354768^2 .

It is not a de Polignac number, because 129065592049 - 2³⁵ = 94705853681 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129065591987 and 129065592005.

It is not an unprimeable number, because it can be changed into a prime (129065592079) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 36283179 + ... + 36286735.

Almost surely, 2^129065592049 is an apocalyptic number.

129065592049 is the 359257-th square number.

129065592049 is the 179629-th centered octagonal number.

It is an amenable number.

129065592049 is a deficient number, since it is larger than the sum of its proper divisors (1327187472).

129065592049 is an frugal number, since it uses more digits than its factorization.

129065592049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7316 (or 3658 counting only the distinct ones).

The product of its (nonzero) digits is 1749600, while the sum is 52.

The spelling of 129065592049 in words is "one hundred twenty-nine billion, sixty-five million, five hundred ninety-two thousand, forty-nine".