129449840289 has 32 divisors (see below), whose sum is σ = 215582954496. Its totient is φ = 67123667520.

The previous prime is 129449840249. The next prime is 129449840327. The reversal of 129449840289 is 982048944921.

It is not a de Polignac number, because 129449840289 - 2¹¹ = 129449838241 is a prime.

It is a super-2 number, since 2×129449840289² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (129449840249) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 385882 + ... + 638595.

It is an arithmetic number, because the mean of its divisors is an integer number (6736967328).

Almost surely, 2^129449840289 is an apocalyptic number.

It is an amenable number.

129449840289 is a deficient number, since it is larger than the sum of its proper divisors (86133114207).

129449840289 is a wasteful number, since it uses less digits than its factorization.

129449840289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025045.

The product of its (nonzero) digits is 11943936, while the sum is 60.

The spelling of 129449840289 in words is "one hundred twenty-nine billion, four hundred forty-nine million, eight hundred forty thousand, two hundred eighty-nine".