129131806643 has 8 divisors (see below), whose sum is σ = 149998539360. Its totient is φ = 108869906880.

The previous prime is 129131806637. The next prime is 129131806723. The reversal of 129131806643 is 346608131921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 129131806643 - 2⁴ = 129131806627 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129131806594 and 129131806603.

It is not an unprimeable number, because it can be changed into a prime (129131806603) 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 in 7 ways as a sum of consecutive naturals, for example, 151207778 + ... + 151208631.

It is an arithmetic number, because the mean of its divisors is an integer number (18749817420).

Almost surely, 2^129131806643 is an apocalyptic number.

129131806643 is a deficient number, since it is larger than the sum of its proper divisors (20866732717).

129131806643 is an equidigital number, since it uses as much as digits as its factorization.

129131806643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302416477.

The product of its (nonzero) digits is 186624, while the sum is 44.

The spelling of 129131806643 in words is "one hundred twenty-nine billion, one hundred thirty-one million, eight hundred six thousand, six hundred forty-three".