28556641763328 has 272 divisors, whose sum is σ = 88880985722880. Its totient is φ = 7985425809408.

The previous prime is 28556641763213. The next prime is 28556641763371. The reversal of 28556641763328 is 82336714665582.

It is a congruent 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, 64463293 + ... + 64904771.

Almost surely, 2^{28556641763328} is an apocalyptic number.

28556641763328 is a gapful number since it is divisible by the number (28) 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 28556641763328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44440492861440).

28556641763328 is an abundant number, since it is smaller than the sum of its proper divisors (60324343959552).

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

28556641763328 is an frugal number, since it uses more digits than its factorization.

28556641763328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441568 (or 441538 counting only the distinct ones).

The product of its digits is 348364800, while the sum is 66.

The spelling of 28556641763328 in words is "twenty-eight trillion, five hundred fifty-six billion, six hundred forty-one million, seven hundred sixty-three thousand, three hundred twenty-eight".