2128785976320 has 176 divisors, whose sum is σ = 6809974010880. Its totient is φ = 567577460736.

The previous prime is 2128785976319. The next prime is 2128785976349. The reversal of 2128785976320 is 236795878212.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144975699 + ... + 144990381.

Almost surely, 2^{2128785976320} is an apocalyptic number.

2128785976320 is a gapful number since it is divisible by the number (20) 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 2128785976320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3404987005440).

2128785976320 is an abundant number, since it is smaller than the sum of its proper divisors (4681188034560).

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

2128785976320 is a wasteful number, since it uses less digits than its factorization.

2128785976320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24150 (or 24132 counting only the distinct ones).

The product of its (nonzero) digits is 20321280, while the sum is 60.

The spelling of 2128785976320 in words is "two trillion, one hundred twenty-eight billion, seven hundred eighty-five million, nine hundred seventy-six thousand, three hundred twenty".