129568500099 has 16 divisors (see below), whose sum is σ = 191961216000. Its totient is φ = 86375452968.

The previous prime is 129568500097. The next prime is 129568500121. The reversal of 129568500099 is 990005865921.

129568500099 is a `hidden beast` number, since 1 + 29 + 568 + 50 + 0 + 0 + 9 + 9 = 666.

It is not a de Polignac number, because 129568500099 - 2¹ = 129568500097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129568500091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 684202 + ... + 852800.

It is an arithmetic number, because the mean of its divisors is an integer number (11997576000).

Almost surely, 2^129568500099 is an apocalyptic number.

129568500099 is a deficient number, since it is larger than the sum of its proper divisors (62392715901).

129568500099 is a wasteful number, since it uses less digits than its factorization.

129568500099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197071 (or 197065 counting only the distinct ones).

The product of its (nonzero) digits is 1749600, while the sum is 54.

The spelling of 129568500099 in words is "one hundred twenty-nine billion, five hundred sixty-eight million, five hundred thousand, ninety-nine".