129768519313 has 4 divisors (see below), whose sum is σ = 129769369380. Its totient is φ = 129767669248.

The previous prime is 129768519299. The next prime is 129768519319. The reversal of 129768519313 is 313915867921.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 76163304529 + 53605214784 = 275977^2 + 231528^2 .

It is a cyclic number.

It is not a de Polignac number, because 129768519313 - 2⁵ = 129768519281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129768519319) 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, 125848 + ... + 524761.

It is an arithmetic number, because the mean of its divisors is an integer number (32442342345).

Almost surely, 2^129768519313 is an apocalyptic number.

It is an amenable number.

129768519313 is a deficient number, since it is larger than the sum of its proper divisors (850067).

129768519313 is an equidigital number, since it uses as much as digits as its factorization.

129768519313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850066.

The product of its digits is 2449440, while the sum is 55.

The spelling of 129768519313 in words is "one hundred twenty-nine billion, seven hundred sixty-eight million, five hundred nineteen thousand, three hundred thirteen".