129357120508 has 96 divisors (see below), whose sum is σ = 285529079808. Its totient is φ = 49813444800.

The previous prime is 129357120491. The next prime is 129357120523. The reversal of 129357120508 is 805021753921.

It is a happy number.

It is a super-2 number, since 2×129357120508² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10594335 + ... + 10606537.

It is an arithmetic number, because the mean of its divisors is an integer number (2974261248).

Almost surely, 2^129357120508 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129357120508, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142764539904).

129357120508 is an abundant number, since it is smaller than the sum of its proper divisors (156171959300).

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

129357120508 is a wasteful number, since it uses less digits than its factorization.

129357120508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12623 (or 12621 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 43.

The spelling of 129357120508 in words is "one hundred twenty-nine billion, three hundred fifty-seven million, one hundred twenty thousand, five hundred eight".