129086623420 has 24 divisors (see below), whose sum is σ = 278408448864. Its totient is φ = 50239118016.

The previous prime is 129086623361. The next prime is 129086623483. The reversal of 129086623420 is 24326680921.

It is a congruent number.

It is an unprimeable number.

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, 87219952 + ... + 87221431.

It is an arithmetic number, because the mean of its divisors is an integer number (11600352036).

Almost surely, 2^129086623420 is an apocalyptic number.

129086623420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129086623420 is an abundant number, since it is smaller than the sum of its proper divisors (149321825444).

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

129086623420 is a wasteful number, since it uses less digits than its factorization.

129086623420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174441429 (or 174441427 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 43.

The spelling of 129086623420 in words is "one hundred twenty-nine billion, eighty-six million, six hundred twenty-three thousand, four hundred twenty".