129039984612 has 144 divisors (see below), whose sum is σ = 412399862784. Its totient is φ = 33044760000.

The previous prime is 129039984581. The next prime is 129039984613. The reversal of 129039984612 is 216489930921.

129039984612 is a `hidden beast` number, since 1 + 2 + 90 + 3 + 9 + 98 + 461 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (129039984613) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 131014 + ... + 524637.

It is an arithmetic number, because the mean of its divisors is an integer number (2863887936).

Almost surely, 2^129039984612 is an apocalyptic number.

129039984612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

129039984612 is an abundant number, since it is smaller than the sum of its proper divisors (283359878172).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129039984612 is a wasteful number, since it uses less digits than its factorization.

129039984612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655750 (or 655745 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 54.

The spelling of 129039984612 in words is "one hundred twenty-nine billion, thirty-nine million, nine hundred eighty-four thousand, six hundred twelve".