129158136577 has 4 divisors (see below), whose sum is σ = 130100896836. Its totient is φ = 128215376320.

The previous prime is 129158136571. The next prime is 129158136607. The reversal of 129158136577 is 775631851921.

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 102835021041 + 26323115536 = 320679^2 + 162244^2 .

It is a cyclic number.

It is not a de Polignac number, because 129158136577 - 2⁷ = 129158136449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129158136571) 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, 471379924 + ... + 471380197.

It is an arithmetic number, because the mean of its divisors is an integer number (32525224209).

Almost surely, 2^129158136577 is an apocalyptic number.

It is an amenable number.

129158136577 is a deficient number, since it is larger than the sum of its proper divisors (942760259).

129158136577 is an equidigital number, since it uses as much as digits as its factorization.

129158136577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942760258.

The product of its digits is 3175200, while the sum is 55.

The spelling of 129158136577 in words is "one hundred twenty-nine billion, one hundred fifty-eight million, one hundred thirty-six thousand, five hundred seventy-seven".