128569689012 has 24 divisors (see below), whose sum is σ = 302358117376. Its totient is φ = 42519109248.

The previous prime is 128569688987. The next prime is 128569689043. The reversal of 128569689012 is 210986965821.

It is a happy number.

It is a super-2 number, since 2×128569689012² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42180133 + ... + 42183180.

Almost surely, 2^128569689012 is an apocalyptic number.

128569689012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128569689012 is an abundant number, since it is smaller than the sum of its proper divisors (173788428364).

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

128569689012 is a wasteful number, since it uses less digits than its factorization.

128569689012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84363447 (or 84363445 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 57.

The spelling of 128569689012 in words is "one hundred twenty-eight billion, five hundred sixty-nine million, six hundred eighty-nine thousand, twelve".