129039040404 has 18 divisors (see below), whose sum is σ = 326182018890. Its totient is φ = 43013013456.

The previous prime is 129039040399. The next prime is 129039040441. The reversal of 129039040404 is 404040930921.

129039040404 is a `hidden beast` number, since 129 + 0 + 3 + 90 + 40 + 404 = 666.

It can be written as a sum of positive squares in only one way, i.e., 94981076100 + 34057964304 = 308190^2 + 184548^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 3584417789 = 129039040404 / (1 + 2 + 9 + 0 + 3 + 9 + 0 + 4 + 0 + 4 + 0 + 4).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1792208859 + ... + 1792208930.

Almost surely, 2^129039040404 is an apocalyptic number.

It is an amenable number.

129039040404 is an abundant number, since it is smaller than the sum of its proper divisors (197142978486).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129039040404 is a wasteful number, since it uses less digits than its factorization.

129039040404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3584417799 (or 3584417794 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The spelling of 129039040404 in words is "one hundred twenty-nine billion, thirty-nine million, forty thousand, four hundred four".