129665570399 has 4 divisors (see below), whose sum is σ = 130924459536. Its totient is φ = 128406681264.

The previous prime is 129665570393. The next prime is 129665570413. The reversal of 129665570399 is 993075566921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129665570399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129665570393) 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, 629444414 + ... + 629444619.

It is an arithmetic number, because the mean of its divisors is an integer number (32731114884).

Almost surely, 2^129665570399 is an apocalyptic number.

129665570399 is a deficient number, since it is larger than the sum of its proper divisors (1258889137).

129665570399 is a wasteful number, since it uses less digits than its factorization.

129665570399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1258889136.

The product of its (nonzero) digits is 27556200, while the sum is 62.

The spelling of 129665570399 in words is "one hundred twenty-nine billion, six hundred sixty-five million, five hundred seventy thousand, three hundred ninety-nine".