129928352135 has 4 divisors (see below), whose sum is σ = 155914022568. Its totient is φ = 103942681704.

The previous prime is 129928352119. The next prime is 129928352143. The reversal of 129928352135 is 531253829921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 531253829921 = 127 ⋅4183101023.

It is a cyclic number.

It is not a de Polignac number, because 129928352135 - 2⁴ = 129928352119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12992835209 + ... + 12992835218.

It is an arithmetic number, because the mean of its divisors is an integer number (38978505642).

Almost surely, 2^129928352135 is an apocalyptic number.

129928352135 is a deficient number, since it is larger than the sum of its proper divisors (25985670433).

129928352135 is an equidigital number, since it uses as much as digits as its factorization.

129928352135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25985670432.

The product of its digits is 1166400, while the sum is 50.

The spelling of 129928352135 in words is "one hundred twenty-nine billion, nine hundred twenty-eight million, three hundred fifty-two thousand, one hundred thirty-five".