129304451218 has 16 divisors (see below), whose sum is σ = 194130440856. Its totient is φ = 64594333440.

The previous prime is 129304451201. The next prime is 129304451233. The reversal of 129304451218 is 812154403921.

It can be written as a sum of positive squares in 4 ways, for example, as 96091940169 + 33212511049 = 309987^2 + 182243^2 .

It is a super-2 number, since 2×129304451218² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

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, 14535580 + ... + 14544472.

Almost surely, 2^129304451218 is an apocalyptic number.

129304451218 is a deficient number, since it is larger than the sum of its proper divisors (64825989638).

129304451218 is a wasteful number, since it uses less digits than its factorization.

129304451218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14589.

The product of its (nonzero) digits is 69120, while the sum is 40.

The spelling of 129304451218 in words is "one hundred twenty-nine billion, three hundred four million, four hundred fifty-one thousand, two hundred eighteen".