128108116656 has 480 divisors, whose sum is σ = 426632693760. Its totient is φ = 35505340416.

The previous prime is 128108116637. The next prime is 128108116679. The reversal of 128108116656 is 656611801821.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 117207246 + ... + 117208338.

It is an arithmetic number, because the mean of its divisors is an integer number (888818112).

Almost surely, 2^128108116656 is an apocalyptic number.

128108116656 is a gapful number since it is divisible by the number (16) 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 128108116656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (213316346880).

128108116656 is an abundant number, since it is smaller than the sum of its proper divisors (298524577104).

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

128108116656 is a wasteful number, since it uses less digits than its factorization.

128108116656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1293 (or 1284 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The spelling of 128108116656 in words is "one hundred twenty-eight billion, one hundred eight million, one hundred sixteen thousand, six hundred fifty-six".