128211496056 has 360 divisors, whose sum is σ = 436946744520. Its totient is φ = 34955540928.

The previous prime is 128211496051. The next prime is 128211496109. The reversal of 128211496056 is 650694112821.

128211496056 is a `hidden beast` number, since 1 + 2 + 8 + 21 + 14 + 9 + 605 + 6 = 666.

It is a super-3 number, since 3×128211496056³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128211496051) by changing a digit.

It is a polite number, since it can be written in 89 ways as a sum of consecutive naturals, for example, 305993815 + ... + 305994233.

It is an arithmetic number, because the mean of its divisors is an integer number (1213740957).

Almost surely, 2^128211496056 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 128211496056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (218473372260).

128211496056 is an abundant number, since it is smaller than the sum of its proper divisors (308735248464).

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

128211496056 is an equidigital number, since it uses as much as digits as its factorization.

128211496056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 893 (or 454 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The spelling of 128211496056 in words is "one hundred twenty-eight billion, two hundred eleven million, four hundred ninety-six thousand, fifty-six".