129096209970 has 640 divisors, whose sum is σ = 450403430400. Its totient is φ = 26336378880.

The previous prime is 129096209941. The next prime is 129096209987. The reversal of 129096209970 is 79902690921.

129096209970 is a `hidden beast` number, since 1 + 2 + 9 + 0 + 9 + 620 + 9 + 9 + 7 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 111964914 + ... + 111966066.

It is an arithmetic number, because the mean of its divisors is an integer number (703755360).

Almost surely, 2^129096209970 is an apocalyptic number.

129096209970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 129096209970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225201715200).

129096209970 is an abundant number, since it is smaller than the sum of its proper divisors (321307220430).

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

129096209970 is a wasteful number, since it uses less digits than its factorization.

129096209970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1237 (or 1214 counting only the distinct ones).

The product of its (nonzero) digits is 1102248, while the sum is 54.

The spelling of 129096209970 in words is "one hundred twenty-nine billion, ninety-six million, two hundred nine thousand, nine hundred seventy".