129159916481 has 4 divisors (see below), whose sum is σ = 130102689732. Its totient is φ = 128217143232.

The previous prime is 129159916471. The next prime is 129159916597. The reversal of 129159916481 is 184619951921.

It is a happy number.

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 67150948225 + 62008968256 = 259135^2 + 249016^2 .

It is a cyclic number.

It is not a de Polignac number, because 129159916481 - 2¹⁰ = 129159915457 is a prime.

It is a super-2 number, since 2×129159916481² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129159916421) 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, 471386420 + ... + 471386693.

It is an arithmetic number, because the mean of its divisors is an integer number (32525672433).

Almost surely, 2^129159916481 is an apocalyptic number.

It is an amenable number.

129159916481 is a deficient number, since it is larger than the sum of its proper divisors (942773251).

129159916481 is an equidigital number, since it uses as much as digits as its factorization.

129159916481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942773250.

The product of its digits is 1399680, while the sum is 56.

The spelling of 129159916481 in words is "one hundred twenty-nine billion, one hundred fifty-nine million, nine hundred sixteen thousand, four hundred eighty-one".