129858718506 has 16 divisors (see below), whose sum is σ = 283328113248. Its totient is φ = 39351126800.

The previous prime is 129858718501. The next prime is 129858718529. The reversal of 129858718506 is 605817858921.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 129858718506.

It is not an unprimeable number, because it can be changed into a prime (129858718501) 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, 983778105 + ... + 983778236.

It is an arithmetic number, because the mean of its divisors is an integer number (17708007078).

Almost surely, 2^129858718506 is an apocalyptic number.

129858718506 is an abundant number, since it is smaller than the sum of its proper divisors (153469394742).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129858718506 is a wasteful number, since it uses less digits than its factorization.

129858718506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1967556357.

The product of its (nonzero) digits is 9676800, while the sum is 60.

The spelling of 129858718506 in words is "one hundred twenty-nine billion, eight hundred fifty-eight million, seven hundred eighteen thousand, five hundred six".