129201536677 has 4 divisors (see below), whose sum is σ = 129622388896. Its totient is φ = 128780684460.

The previous prime is 129201536623. The next prime is 129201536683. The reversal of 129201536677 is 776635102921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 776635102921 = 113 ⋅6872877017.

It is a cyclic number.

It is not a de Polignac number, because 129201536677 - 2¹⁹ = 129201012389 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 129201536677.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129201536377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210425649 + ... + 210426262.

It is an arithmetic number, because the mean of its divisors is an integer number (32405597224).

Almost surely, 2^129201536677 is an apocalyptic number.

It is an amenable number.

129201536677 is a deficient number, since it is larger than the sum of its proper divisors (420852219).

129201536677 is an equidigital number, since it uses as much as digits as its factorization.

129201536677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420852218.

The product of its (nonzero) digits is 952560, while the sum is 49.

The spelling of 129201536677 in words is "one hundred twenty-nine billion, two hundred one million, five hundred thirty-six thousand, six hundred seventy-seven".