129520576195613 has 4 divisors (see below), whose sum is σ = 131964360652188. Its totient is φ = 127076791739040.

The previous prime is 129520576195601. The next prime is 129520576195639. The reversal of 129520576195613 is 316591675025921.

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

It can be written as a sum of positive squares in 2 ways, for example, as 69653495981689 + 59867080213924 = 8345867^2 + 7737382^2 .

It is a cyclic number.

It is not a de Polignac number, because 129520576195613 - 2²⁸ = 129520307760157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129520576195663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1221892228208 + ... + 1221892228313.

It is an arithmetic number, because the mean of its divisors is an integer number (32991090163047).

Almost surely, 2^{129520576195613} is an apocalyptic number.

It is an amenable number.

129520576195613 is a deficient number, since it is larger than the sum of its proper divisors (2443784456575).

129520576195613 is an equidigital number, since it uses as much as digits as its factorization.

129520576195613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2443784456574.

The product of its (nonzero) digits is 30618000, while the sum is 62.

The spelling of 129520576195613 in words is "one hundred twenty-nine trillion, five hundred twenty billion, five hundred seventy-six million, one hundred ninety-five thousand, six hundred thirteen".