128404809318720 has 224 divisors, whose sum is σ = 468155334228480. Its totient is φ = 29490099701760.

The previous prime is 128404809318661. The next prime is 128404809318757. The reversal of 128404809318720 is 27813908404821.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 319787422 + ... + 320188701.

Almost surely, 2^{128404809318720} is an apocalyptic number.

128404809318720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128404809318720 is an abundant number, since it is smaller than the sum of its proper divisors (339750524909760).

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

128404809318720 is a wasteful number, since it uses less digits than its factorization.

128404809318720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639976173 (or 639976163 counting only the distinct ones).

The product of its (nonzero) digits is 6193152, while the sum is 57.

The spelling of 128404809318720 in words is "one hundred twenty-eight trillion, four hundred four billion, eight hundred nine million, three hundred eighteen thousand, seven hundred twenty".