129685265867 has 8 divisors (see below), whose sum is σ = 137321021376. Its totient is φ = 122050311552.

The previous prime is 129685265839. The next prime is 129685265869. The reversal of 129685265867 is 768562586921.

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 129685265867 - 2⁶ = 129685265803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129685265869) 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, 150533 + ... + 531065.

It is an arithmetic number, because the mean of its divisors is an integer number (17165127672).

Almost surely, 2^129685265867 is an apocalyptic number.

129685265867 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

129685265867 is a deficient number, since it is larger than the sum of its proper divisors (7635755509).

129685265867 is a wasteful number, since it uses less digits than its factorization.

129685265867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400597.

The product of its digits is 87091200, while the sum is 65.

The spelling of 129685265867 in words is "one hundred twenty-nine billion, six hundred eighty-five million, two hundred sixty-five thousand, eight hundred sixty-seven".