2128351989312 has 224 divisors, whose sum is σ = 6389658950400. Its totient is φ = 694466113536.

The previous prime is 2128351989271. The next prime is 2128351989317. The reversal of 2128351989312 is 2139891538212.

2128351989312 is a `hidden beast` number, since 2 + 1 + 28 + 3 + 519 + 8 + 93 + 12 = 666.

It is a super-4 number, since 4×2128351989312⁴ (a number of 50 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (2128351989317) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40178908 + ... + 40231844.

Almost surely, 2^{2128351989312} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2128351989312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3194829475200).

2128351989312 is an abundant number, since it is smaller than the sum of its proper divisors (4261306961088).

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

2128351989312 is a wasteful number, since it uses less digits than its factorization.

2128351989312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53450 (or 53434 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 54.

The spelling of 2128351989312 in words is "two trillion, one hundred twenty-eight billion, three hundred fifty-one million, nine hundred eighty-nine thousand, three hundred twelve".