2128535601984 has 168 divisors, whose sum is σ = 6658336919520. Its totient is φ = 644755737600.

The previous prime is 2128535601971. The next prime is 2128535602009. The reversal of 2128535601984 is 4891065358212.

2128535601984 is a `hidden beast` number, since 2 + 1 + 28 + 5 + 3 + 5 + 601 + 9 + 8 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 2128535601984.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16275414 + ... + 16405674.

Almost surely, 2^{2128535601984} is an apocalyptic number.

2128535601984 is a gapful number since it is divisible by the number (24) 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 2128535601984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3329168459760).

2128535601984 is an abundant number, since it is smaller than the sum of its proper divisors (4529801317536).

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

2128535601984 is a wasteful number, since it uses less digits than its factorization.

2128535601984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132869 (or 132856 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 54.

The spelling of 2128535601984 in words is "two trillion, one hundred twenty-eight billion, five hundred thirty-five million, six hundred one thousand, nine hundred eighty-four".