169128129612 has 192 divisors, whose sum is σ = 446345625600. Its totient is φ = 49502638080.

The previous prime is 169128129593. The next prime is 169128129613. The reversal of 169128129612 is 216921821961.

It is not an unprimeable number, because it can be changed into a prime (169128129613) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 47923464 + ... + 47926992.

It is an arithmetic number, because the mean of its divisors is an integer number (2324716800).

Almost surely, 2^169128129612 is an apocalyptic number.

169128129612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 169128129612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223172812800).

169128129612 is an abundant number, since it is smaller than the sum of its proper divisors (277217495988).

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

169128129612 is a wasteful number, since it uses less digits than its factorization.

169128129612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3776 (or 3774 counting only the distinct ones).

The product of its digits is 186624, while the sum is 48.

The spelling of 169128129612 in words is "one hundred sixty-nine billion, one hundred twenty-eight million, one hundred twenty-nine thousand, six hundred twelve".