129647652577 has 2 divisors, whose sum is σ = 129647652578. Its totient is φ = 129647652576.

The previous prime is 129647652539. The next prime is 129647652637. The reversal of 129647652577 is 775256746921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111615459921 + 18032192656 = 334089^2 + 134284^2 .

It is an emirp because it is prime and its reverse (775256746921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129647652577 - 2¹¹ = 129647650529 is a prime.

It is not a weakly prime, because it can be changed into another prime (129647602577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64823826288 + 64823826289.

It is an arithmetic number, because the mean of its divisors is an integer number (64823826289).

Almost surely, 2^129647652577 is an apocalyptic number.

It is an amenable number.

129647652577 is a deficient number, since it is larger than the sum of its proper divisors (1).

129647652577 is an equidigital number, since it uses as much as digits as its factorization.

129647652577 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 44452800, while the sum is 61.

The spelling of 129647652577 in words is "one hundred twenty-nine billion, six hundred forty-seven million, six hundred fifty-two thousand, five hundred seventy-seven".