129136463325 has 84 divisors (see below), whose sum is σ = 240512918688. Its totient is φ = 68749754400.

The previous prime is 129136463293. The next prime is 129136463329. The reversal of 129136463325 is 523364631921.

129136463325 is a `hidden beast` number, since 1 + 2 + 9 + 1 + 3 + 6 + 4 + 633 + 2 + 5 = 666.

It is not a de Polignac number, because 129136463325 - 2⁵ = 129136463293 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129136463329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 10692040 + ... + 10704110.

It is an arithmetic number, because the mean of its divisors is an integer number (2863249032).

Almost surely, 2^129136463325 is an apocalyptic number.

129136463325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129136463325 is a deficient number, since it is larger than the sum of its proper divisors (111376455363).

129136463325 is an equidigital number, since it uses as much as digits as its factorization.

129136463325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12686 (or 12666 counting only the distinct ones).

The product of its digits is 699840, while the sum is 45.

The spelling of 129136463325 in words is "one hundred twenty-nine billion, one hundred thirty-six million, four hundred sixty-three thousand, three hundred twenty-five".