129081512784 has 40 divisors (see below), whose sum is σ = 381097800640. Its totient is φ = 36880432128.

The previous prime is 129081512783. The next prime is 129081512887. The reversal of 129081512784 is 487215180921.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129081512783) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 192085249 + ... + 192085920.

It is an arithmetic number, because the mean of its divisors is an integer number (9527445016).

Almost surely, 2^129081512784 is an apocalyptic number.

129081512784 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

129081512784 is an abundant number, since it is smaller than the sum of its proper divisors (252016287856).

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

129081512784 is a wasteful number, since it uses less digits than its factorization.

129081512784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384171187 (or 384171181 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 48.

The spelling of 129081512784 in words is "one hundred twenty-nine billion, eighty-one million, five hundred twelve thousand, seven hundred eighty-four".