129144239858 has 8 divisors (see below), whose sum is σ = 193856636460. Its totient is φ = 64525361040.

The previous prime is 129144239837. The next prime is 129144239909. The reversal of 129144239858 is 858932441921.

It can be written as a sum of positive squares in 2 ways, for example, as 128061632449 + 1082607409 = 357857^2 + 32903^2 .

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

It is an unprimeable number.

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, 23375993 + ... + 23381516.

Almost surely, 2^129144239858 is an apocalyptic number.

129144239858 is a deficient number, since it is larger than the sum of its proper divisors (64712396602).

129144239858 is a wasteful number, since it uses less digits than its factorization.

129144239858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46758892.

The product of its digits is 4976640, while the sum is 56.

The spelling of 129144239858 in words is "one hundred twenty-nine billion, one hundred forty-four million, two hundred thirty-nine thousand, eight hundred fifty-eight".