129605104020 has 48 divisors (see below), whose sum is σ = 414736334208. Its totient is φ = 29624023680.

The previous prime is 129605104007. The next prime is 129605104039. The reversal of 129605104020 is 20401506921.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 154291371 + ... + 154292210.

It is an arithmetic number, because the mean of its divisors is an integer number (8640340296).

Almost surely, 2^129605104020 is an apocalyptic number.

129605104020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129605104020 is an abundant number, since it is smaller than the sum of its proper divisors (285131230188).

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

129605104020 is a wasteful number, since it uses less digits than its factorization.

129605104020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308583600 (or 308583598 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The spelling of 129605104020 in words is "one hundred twenty-nine billion, six hundred five million, one hundred four thousand, twenty".