2568530778 has 16 divisors (see below), whose sum is σ = 5604067296. Its totient is φ = 778342640.

The previous prime is 2568530771. The next prime is 2568530791. The reversal of 2568530778 is 8770358652.

It is a self number, because there is not a number n which added to its sum of digits gives 2568530778.

It is not an unprimeable number, because it can be changed into a prime (2568530771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19458501 + ... + 19458632.

It is an arithmetic number, because the mean of its divisors is an integer number (350254206).

Almost surely, 2^2568530778 is an apocalyptic number.

2568530778 is an abundant number, since it is smaller than the sum of its proper divisors (3035536518).

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

2568530778 is a wasteful number, since it uses less digits than its factorization.

2568530778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38917149.

The product of its (nonzero) digits is 2822400, while the sum is 51.

The square root of 2568530778 is about 50680.6746008772. The cubic root of 2568530778 is about 1369.4985960623.

The spelling of 2568530778 in words is "two billion, five hundred sixty-eight million, five hundred thirty thousand, seven hundred seventy-eight".