129798182018 has 6 divisors (see below), whose sum is σ = 194698037289. Its totient is φ = 64898836256.

The previous prime is 129798181979. The next prime is 129798182023. The reversal of 129798182018 is 810281897921.

It can be written as a sum of positive squares in 2 ways, for example, as 106757067169 + 23041114849 = 326737^2 + 151793^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=254753.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 382130 + ... + 636882.

Almost surely, 2^129798182018 is an apocalyptic number.

129798182018 is a deficient number, since it is larger than the sum of its proper divisors (64899855271).

129798182018 is an frugal number, since it uses more digits than its factorization.

129798182018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509508 (or 254755 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 56.

The spelling of 129798182018 in words is "one hundred twenty-nine billion, seven hundred ninety-eight million, one hundred eighty-two thousand, eighteen".