2568378456 has 160 divisors (see below), whose sum is σ = 8283543840. Its totient is φ = 728289792.

The previous prime is 2568378451. The next prime is 2568378493. The reversal of 2568378456 is 6548738652.

2568378456 is a `hidden beast` number, since 2 + 568 + 3 + 78 + 4 + 5 + 6 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2568378451) by changing a digit.

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, 619366 + ... + 623498.

It is an arithmetic number, because the mean of its divisors is an integer number (51772149).

Almost surely, 2^2568378456 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 2568378456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4141771920).

2568378456 is an abundant number, since it is smaller than the sum of its proper divisors (5715165384).

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

2568378456 is a wasteful number, since it uses less digits than its factorization.

2568378456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4295 (or 4282 counting only the distinct ones).

The product of its digits is 9676800, while the sum is 54.

The square root of 2568378456 is about 50679.1718164376. The cubic root of 2568378456 is about 1369.4715236608.

The spelling of 2568378456 in words is "two billion, five hundred sixty-eight million, three hundred seventy-eight thousand, four hundred fifty-six".