129345688877229 has 108 divisors (see below), whose sum is σ = 213426025515612. Its totient is φ = 78326327946240.

The previous prime is 129345688877221. The next prime is 129345688877233. The reversal of 129345688877229 is 922778886543921.

129345688877229 is a `hidden beast` number, since 1 + 2 + 9 + 3 + 456 + 88 + 87 + 7 + 2 + 2 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 61785919601604 + 67559769275625 = 7860402^2 + 8219475^2 .

It is not a de Polignac number, because 129345688877229 - 2³ = 129345688877221 is a prime.

It is a super-2 number, since 2×129345688877229² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129345688877221) by changing a digit.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 966086239 + ... + 966220115.

Almost surely, 2^{129345688877229} is an apocalyptic number.

It is an amenable number.

129345688877229 is a deficient number, since it is larger than the sum of its proper divisors (84080336638383).

129345688877229 is an equidigital number, since it uses as much as digits as its factorization.

129345688877229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135140 (or 135108 counting only the distinct ones).

The product of its digits is 5852528640, while the sum is 81.

The spelling of 129345688877229 in words is "one hundred twenty-nine trillion, three hundred forty-five billion, six hundred eighty-eight million, eight hundred seventy-seven thousand, two hundred twenty-nine".