129611135205 has 64 divisors (see below), whose sum is σ = 242690476800. Its totient is φ = 65449036800.

The previous prime is 129611135197. The next prime is 129611135233. The reversal of 129611135205 is 502531116921.

It is a happy number.

129611135205 is a `hidden beast` number, since 1 + 2 + 9 + 611 + 1 + 35 + 2 + 0 + 5 = 666.

It is not a de Polignac number, because 129611135205 - 2³ = 129611135197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129611135205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4605537 + ... + 4633593.

It is an arithmetic number, because the mean of its divisors is an integer number (3792038700).

Almost surely, 2^129611135205 is an apocalyptic number.

129611135205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129611135205 is a deficient number, since it is larger than the sum of its proper divisors (113079341595).

129611135205 is a wasteful number, since it uses less digits than its factorization.

129611135205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29891 (or 29885 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 36.

The spelling of 129611135205 in words is "one hundred twenty-nine billion, six hundred eleven million, one hundred thirty-five thousand, two hundred five".