129126485819 has 8 divisors (see below), whose sum is σ = 131404243152. Its totient is φ = 126865919520.

The previous prime is 129126485797. The next prime is 129126485843. The reversal of 129126485819 is 918584621921.

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

It is a cyclic number.

It is not a de Polignac number, because 129126485819 - 2³² = 124831518523 is a prime.

It is a super-2 number, since 2×129126485819² (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 (129126385819) 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 7 ways as a sum of consecutive naturals, for example, 4282604 + ... + 4312649.

It is an arithmetic number, because the mean of its divisors is an integer number (16425530394).

Almost surely, 2^129126485819 is an apocalyptic number.

129126485819 is a deficient number, since it is larger than the sum of its proper divisors (2277757333).

129126485819 is an equidigital number, since it uses as much as digits as its factorization.

129126485819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8595517.

The product of its digits is 2488320, while the sum is 56.

The spelling of 129126485819 in words is "one hundred twenty-nine billion, one hundred twenty-six million, four hundred eighty-five thousand, eight hundred nineteen".