129665570392 has 8 divisors (see below), whose sum is σ = 243122944500. Its totient is φ = 64832785192.

The previous prime is 129665570389. The next prime is 129665570393. The reversal of 129665570392 is 293075566921.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

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 as a sum of consecutive naturals, namely, 8104098142 + ... + 8104098157.

Almost surely, 2^129665570392 is an apocalyptic number.

It is an amenable number.

129665570392 is a deficient number, since it is larger than the sum of its proper divisors (113457374108).

129665570392 is a wasteful number, since it uses less digits than its factorization.

129665570392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16208196305 (or 16208196301 counting only the distinct ones).

The product of its (nonzero) digits is 6123600, while the sum is 55.

The spelling of 129665570392 in words is "one hundred twenty-nine billion, six hundred sixty-five million, five hundred seventy thousand, three hundred ninety-two".