129142987809696 has 144 divisors (see below), whose sum is σ = 419718054974400. Its totient is φ = 36897702488064.

The previous prime is 129142987809677. The next prime is 129142987809827. The reversal of 129142987809696 is 696908789241921.

129142987809696 is a `hidden beast` number, since 1 + 2 + 91 + 4 + 298 + 78 + 0 + 96 + 96 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×129142987809696² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 447990535 + ... + 448278713.

It is an arithmetic number, because the mean of its divisors is an integer number (2914708715100).

Almost surely, 2^{129142987809696} is an apocalyptic number.

129142987809696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

129142987809696 is an abundant number, since it is smaller than the sum of its proper divisors (290575067164704).

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

129142987809696 is a wasteful number, since it uses less digits than its factorization.

129142987809696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510491 (or 510480 counting only the distinct ones).

The product of its (nonzero) digits is 1693052928, while the sum is 81.

The spelling of 129142987809696 in words is "one hundred twenty-nine trillion, one hundred forty-two billion, nine hundred eighty-seven million, eight hundred nine thousand, six hundred ninety-six".