129535755439 has 4 divisors (see below), whose sum is σ = 129547914256. Its totient is φ = 129523596624.

The previous prime is 129535755407. The next prime is 129535755449. The reversal of 129535755439 is 934557535921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 129535755439 - 2⁵ = 129535755407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129535755449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6063414 + ... + 6084739.

It is an arithmetic number, because the mean of its divisors is an integer number (32386978564).

Almost surely, 2^129535755439 is an apocalyptic number.

129535755439 is a deficient number, since it is larger than the sum of its proper divisors (12158817).

129535755439 is a wasteful number, since it uses less digits than its factorization.

129535755439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12158816.

The product of its digits is 25515000, while the sum is 58.

The spelling of 129535755439 in words is "one hundred twenty-nine billion, five hundred thirty-five million, seven hundred fifty-five thousand, four hundred thirty-nine".