129040810540 has 12 divisors (see below), whose sum is σ = 270985702176. Its totient is φ = 51616324208.

The previous prime is 129040810531. The next prime is 129040810573. The reversal of 129040810540 is 45018040921.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 129040810496 and 129040810505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3226020244 + ... + 3226020283.

It is an arithmetic number, because the mean of its divisors is an integer number (22582141848).

Almost surely, 2^129040810540 is an apocalyptic number.

129040810540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129040810540 is an abundant number, since it is smaller than the sum of its proper divisors (141944891636).

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

129040810540 is a wasteful number, since it uses less digits than its factorization.

129040810540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6452040536 (or 6452040534 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

The spelling of 129040810540 in words is "one hundred twenty-nine billion, forty million, eight hundred ten thousand, five hundred forty".