129839255185968 has 180 divisors, whose sum is σ = 377348265123648. Its totient is φ = 43277216803200.

The previous prime is 129839255185963. The next prime is 129839255185979. The reversal of 129839255185968 is 869581552938921.

It is a happy number.

129839255185968 is a `hidden beast` number, since 1 + 2 + 9 + 8 + 3 + 9 + 2 + 5 + 5 + 18 + 596 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is not an unprimeable number, because it can be changed into a prime (129839255185963) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2892171330 + ... + 2892216222.

Almost surely, 2^{129839255185968} is an apocalyptic number.

129839255185968 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129839255185968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188674132561824).

129839255185968 is an abundant number, since it is smaller than the sum of its proper divisors (247509009937680).

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

129839255185968 is an frugal number, since it uses more digits than its factorization.

129839255185968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72476 (or 72449 counting only the distinct ones).

The product of its digits is 3359232000, while the sum is 81.

The spelling of 129839255185968 in words is "one hundred twenty-nine trillion, eight hundred thirty-nine billion, two hundred fifty-five million, one hundred eighty-five thousand, nine hundred sixty-eight".