129243292418 has 8 divisors (see below), whose sum is σ = 193884853500. Its totient is φ = 64615007920.

The previous prime is 129243292417. The next prime is 129243292429. The reversal of 129243292418 is 814292342921.

It can be written as a sum of positive squares in 2 ways, for example, as 128646320929 + 596971489 = 358673^2 + 24433^2 .

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

It is not an unprimeable number, because it can be changed into a prime (129243292417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3294773 + ... + 3333768.

Almost surely, 2^129243292418 is an apocalyptic number.

129243292418 is a deficient number, since it is larger than the sum of its proper divisors (64641561082).

129243292418 is an equidigital number, since it uses as much as digits as its factorization.

129243292418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6638292.

The product of its digits is 497664, while the sum is 47.

The spelling of 129243292418 in words is "one hundred twenty-nine billion, two hundred forty-three million, two hundred ninety-two thousand, four hundred eighteen".