2478581856 has 240 divisors, whose sum is σ = 7584092208. Its totient is φ = 793497600.

The previous prime is 2478581839. The next prime is 2478581869. The reversal of 2478581856 is 6581858742.

2478581856 is a `hidden beast` number, since 2 + 4 + 7 + 8 + 581 + 8 + 56 = 666.

It is a super-2 number, since 2×2478581856² = 12286736033784809472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

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 39 ways as a sum of consecutive naturals, for example, 8820436 + ... + 8820716.

Almost surely, 2^2478581856 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 2478581856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3792046104).

2478581856 is an abundant number, since it is smaller than the sum of its proper divisors (5105510352).

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

2478581856 is a wasteful number, since it uses less digits than its factorization.

2478581856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427 (or 410 counting only the distinct ones).

The product of its digits is 4300800, while the sum is 54.

The square root of 2478581856 is about 49785.3578474635. The cubic root of 2478581856 is about 1353.3218343451.

The spelling of 2478581856 in words is "two billion, four hundred seventy-eight million, five hundred eighty-one thousand, eight hundred fifty-six".