128726766912 has 56 divisors (see below), whose sum is σ = 351576347392. Its totient is φ = 41524761600.

The previous prime is 128726766713. The next prime is 128726766953. The reversal of 128726766912 is 219667627821.

It is a happy number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 10807789 + ... + 10819692.

Almost surely, 2^128726766912 is an apocalyptic number.

128726766912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128726766912 is an abundant number, since it is smaller than the sum of its proper divisors (222849580480).

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

128726766912 is a wasteful number, since it uses less digits than its factorization.

128726766912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21627527 (or 21627517 counting only the distinct ones).

The product of its digits is 6096384, while the sum is 57.

The spelling of 128726766912 in words is "one hundred twenty-eight billion, seven hundred twenty-six million, seven hundred sixty-six thousand, nine hundred twelve".