129161520255613 has 2 divisors, whose sum is σ = 129161520255614. Its totient is φ = 129161520255612.

The previous prime is 129161520255601. The next prime is 129161520255641. The reversal of 129161520255613 is 316552025161921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90438616446084 + 38722903809529 = 9509922^2 + 6222773^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129161520255613 is a prime.

It is a super-2 number, since 2×129161520255613² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129161520255673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64580760127806 + 64580760127807.

It is an arithmetic number, because the mean of its divisors is an integer number (64580760127807).

Almost surely, 2^{129161520255613} is an apocalyptic number.

It is an amenable number.

129161520255613 is a deficient number, since it is larger than the sum of its proper divisors (1).

129161520255613 is an equidigital number, since it uses as much as digits as its factorization.

129161520255613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972000, while the sum is 49.

The spelling of 129161520255613 in words is "one hundred twenty-nine trillion, one hundred sixty-one billion, five hundred twenty million, two hundred fifty-five thousand, six hundred thirteen".