129126325208 has 8 divisors (see below), whose sum is σ = 242111859780. Its totient is φ = 64563162600.

The previous prime is 129126325193. The next prime is 129126325217. The reversal of 129126325208 is 802523621921.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8070395318 + ... + 8070395333.

Almost surely, 2^129126325208 is an apocalyptic number.

It is an amenable number.

129126325208 is a deficient number, since it is larger than the sum of its proper divisors (112985534572).

129126325208 is a wasteful number, since it uses less digits than its factorization.

129126325208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16140790657 (or 16140790653 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 41.

The spelling of 129126325208 in words is "one hundred twenty-nine billion, one hundred twenty-six million, three hundred twenty-five thousand, two hundred eight".