129665570401 has 8 divisors (see below), whose sum is σ = 130883013800. Its totient is φ = 128448633600.

The previous prime is 129665570393. The next prime is 129665570413. The reversal of 129665570401 is 104075566921.

It can be written as a sum of positive squares in 4 ways, for example, as 210250000 + 129455320401 = 14500^2 + 359799^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 129665570401 - 2³ = 129665570393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129665570491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 397801 + ... + 646201.

It is an arithmetic number, because the mean of its divisors is an integer number (16360376725).

Almost surely, 2^129665570401 is an apocalyptic number.

It is an amenable number.

129665570401 is a deficient number, since it is larger than the sum of its proper divisors (1217443399).

129665570401 is a wasteful number, since it uses less digits than its factorization.

129665570401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253299.

The product of its (nonzero) digits is 453600, while the sum is 46.

The spelling of 129665570401 in words is "one hundred twenty-nine billion, six hundred sixty-five million, five hundred seventy thousand, four hundred one".