129242156400 has 180 divisors, whose sum is σ = 512578595152. Its totient is φ = 29541058560.

The previous prime is 129242156359. The next prime is 129242156419. The reversal of 129242156400 is 4651242921.

It is a happy number.

129242156400 is a `hidden beast` number, since 1 + 2 + 9 + 2 + 4 + 2 + 1 + 5 + 640 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (180).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2539129 + ... + 2589528.

Almost surely, 2^129242156400 is an apocalyptic number.

129242156400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129242156400 is an abundant number, since it is smaller than the sum of its proper divisors (383336438752).

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

129242156400 is a wasteful number, since it uses less digits than its factorization.

129242156400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5128688 (or 5128674 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 129242156400 in words is "one hundred twenty-nine billion, two hundred forty-two million, one hundred fifty-six thousand, four hundred".