129275654816 has 48 divisors (see below), whose sum is σ = 317312976960. Its totient is φ = 50367137280.

The previous prime is 129275654701. The next prime is 129275654831. The reversal of 129275654816 is 618456572921.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26230421 + ... + 26235348.

It is an arithmetic number, because the mean of its divisors is an integer number (6610687020).

Almost surely, 2^129275654816 is an apocalyptic number.

129275654816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

129275654816 is an abundant number, since it is smaller than the sum of its proper divisors (188037322144).

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

129275654816 is a wasteful number, since it uses less digits than its factorization.

129275654816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52465797 (or 52465789 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 56.

The spelling of 129275654816 in words is "one hundred twenty-nine billion, two hundred seventy-five million, six hundred fifty-four thousand, eight hundred sixteen".