129159756849 has 8 divisors (see below), whose sum is σ = 174392920960. Its totient is φ = 85016548656.

The previous prime is 129159756829. The next prime is 129159756853. The reversal of 129159756849 is 948657951921.

It is a happy number.

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

It is not a de Polignac number, because 129159756849 - 2²⁴ = 129142979633 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 129159756849.

It is not an unprimeable number, because it can be changed into a prime (129159756809) 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 7 ways as a sum of consecutive naturals, for example, 272488702 + ... + 272489175.

It is an arithmetic number, because the mean of its divisors is an integer number (21799115120).

Almost surely, 2^129159756849 is an apocalyptic number.

It is an amenable number.

129159756849 is a deficient number, since it is larger than the sum of its proper divisors (45233164111).

129159756849 is an equidigital number, since it uses as much as digits as its factorization.

129159756849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544977959.

The product of its digits is 48988800, while the sum is 66.

The spelling of 129159756849 in words is "one hundred twenty-nine billion, one hundred fifty-nine million, seven hundred fifty-six thousand, eight hundred forty-nine".