129868187904 has 1296 divisors, whose sum is σ = 504162247680. Its totient is φ = 31399280640.

The previous prime is 129868187899. The next prime is 129868187989. The reversal of 129868187904 is 409781868921.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 2450343142 + ... + 2450343194.

It is an arithmetic number, because the mean of its divisors is an integer number (389014080).

Almost surely, 2^129868187904 is an apocalyptic number.

129868187904 is a gapful number since it is divisible by the number (14) 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 129868187904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (252081123840).

129868187904 is an abundant number, since it is smaller than the sum of its proper divisors (374294059776).

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

129868187904 is a wasteful number, since it uses less digits than its factorization.

129868187904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 13934592, while the sum is 63.

The spelling of 129868187904 in words is "one hundred twenty-nine billion, eight hundred sixty-eight million, one hundred eighty-seven thousand, nine hundred four".