5278554521856 has 2592 divisors, whose sum is σ = 21545084381184. Its totient is φ = 1256900198400.

The previous prime is 5278554521843. The next prime is 5278554521909. The reversal of 5278554521856 is 6581254558725.

5278554521856 is a `hidden beast` number, since 5 + 2 + 7 + 8 + 5 + 54 + 521 + 8 + 56 = 666.

It is a tau number, because it is divible by the number of its divisors (2592).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 5278554521793 and 5278554521802.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 63597042391 + ... + 63597042473.

It is an arithmetic number, because the mean of its divisors is an integer number (8312146752).

Almost surely, 2^{5278554521856} is an apocalyptic number.

5278554521856 is a gapful number since it is divisible by the number (56) 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 5278554521856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10772542190592).

5278554521856 is an abundant number, since it is smaller than the sum of its proper divisors (16266529859328).

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

5278554521856 is a wasteful number, since it uses less digits than its factorization.

5278554521856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231 (or 194 counting only the distinct ones).

The product of its digits is 134400000, while the sum is 63.

The spelling of 5278554521856 in words is "five trillion, two hundred seventy-eight billion, five hundred fifty-four million, five hundred twenty-one thousand, eight hundred fifty-six".