129155068185 has 64 divisors (see below), whose sum is σ = 243679000320. Its totient is φ = 57588526080.

The previous prime is 129155068183. The next prime is 129155068219. The reversal of 129155068185 is 581860551921.

It is not a de Polignac number, because 129155068185 - 2¹ = 129155068183 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129155068183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 465087 + ... + 688923.

It is an arithmetic number, because the mean of its divisors is an integer number (3807484380).

Almost surely, 2^129155068185 is an apocalyptic number.

129155068185 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129155068185 is a deficient number, since it is larger than the sum of its proper divisors (114523932135).

129155068185 is a wasteful number, since it uses less digits than its factorization.

129155068185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224138.

The product of its (nonzero) digits is 864000, while the sum is 51.

The spelling of 129155068185 in words is "one hundred twenty-nine billion, one hundred fifty-five million, sixty-eight thousand, one hundred eighty-five".