129254710440 has 64 divisors (see below), whose sum is σ = 387791919360. Its totient is φ = 34465452800.

The previous prime is 129254710439. The next prime is 129254710447. The reversal of 129254710440 is 44017452921.

It is not an unprimeable number, because it can be changed into a prime (129254710447) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2164990 + ... + 2223890.

It is an arithmetic number, because the mean of its divisors is an integer number (6059248740).

Almost surely, 2^129254710440 is an apocalyptic number.

129254710440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129254710440 is an abundant number, since it is smaller than the sum of its proper divisors (258537208920).

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

129254710440 is a wasteful number, since it uses less digits than its factorization.

129254710440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77202 (or 77198 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The spelling of 129254710440 in words is "one hundred twenty-nine billion, two hundred fifty-four million, seven hundred ten thousand, four hundred forty".