28555866795456 has 3360 divisors, whose sum is σ = 119565886587840. Its totient is φ = 6676899102720.

The previous prime is 28555866795437. The next prime is 28555866795557. The reversal of 28555866795456 is 65459766855582.

28555866795456 is a `hidden beast` number, since 2 + 8 + 5 + 5 + 5 + 8 + 6 + 67 + 9 + 545 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 479 ways as a sum of consecutive naturals, for example, 320852435860 + ... + 320852435948.

It is an arithmetic number, because the mean of its divisors is an integer number (35585085294).

Almost surely, 2^{28555866795456} is an apocalyptic number.

28555866795456 is a gapful number since it is divisible by the number (26) 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 28555866795456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59782943293920).

28555866795456 is an abundant number, since it is smaller than the sum of its proper divisors (91010019792384).

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

28555866795456 is a wasteful number, since it uses less digits than its factorization.

28555866795456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246 (or 198 counting only the distinct ones).

The product of its digits is 21772800000, while the sum is 81.

The spelling of 28555866795456 in words is "twenty-eight trillion, five hundred fifty-five billion, eight hundred sixty-six million, seven hundred ninety-five thousand, four hundred fifty-six".