128831783680 has 144 divisors (see below), whose sum is σ = 311021907840. Its totient is φ = 51128827904.

The previous prime is 128831783623. The next prime is 128831783693. The reversal of 128831783680 is 86387138821.

It is a happy 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 15 ways as a sum of consecutive naturals, for example, 107989164 + ... + 107990356.

It is an arithmetic number, because the mean of its divisors is an integer number (2159874360).

Almost surely, 2^128831783680 is an apocalyptic number.

128831783680 is a gapful number since it is divisible by the number (10) 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 128831783680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155510953920).

128831783680 is an abundant number, since it is smaller than the sum of its proper divisors (182190124160).

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

128831783680 is a wasteful number, since it uses less digits than its factorization.

128831783680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1806 (or 1792 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 55.

The spelling of 128831783680 in words is "one hundred twenty-eight billion, eight hundred thirty-one million, seven hundred eighty-three thousand, six hundred eighty".