129986856648 has 192 divisors, whose sum is σ = 411125944320. Its totient is φ = 38119118400.

The previous prime is 129986856607. The next prime is 129986856661. The reversal of 129986856648 is 846658689921.

129986856648 is a `hidden beast` number, since 12 + 9 + 9 + 8 + 6 + 8 + 566 + 48 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 564861 + ... + 760947.

It is an arithmetic number, because the mean of its divisors is an integer number (2141280960).

Almost surely, 2^129986856648 is an apocalyptic number.

129986856648 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 129986856648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (205562972160).

129986856648 is an abundant number, since it is smaller than the sum of its proper divisors (281139087672).

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

129986856648 is a wasteful number, since it uses less digits than its factorization.

129986856648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196150 (or 196134 counting only the distinct ones).

The product of its digits is 358318080, while the sum is 72.

The spelling of 129986856648 in words is "one hundred twenty-nine billion, nine hundred eighty-six million, eight hundred fifty-six thousand, six hundred forty-eight".