2568128247 has 24 divisors (see below), whose sum is σ = 3899632464. Its totient is φ = 1688620608.

The previous prime is 2568128209. The next prime is 2568128249. The reversal of 2568128247 is 7428218652.

2568128247 is a `hidden beast` number, since 2 + 568 + 1 + 2 + 82 + 4 + 7 = 666.

2568128247 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2568128247 - 2⁶ = 2568128183 is a prime.

It is a super-3 number, since 3×2568128247³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2568128249) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54648 + ... + 90125.

It is an arithmetic number, because the mean of its divisors is an integer number (162484686).

Almost surely, 2^2568128247 is an apocalyptic number.

2568128247 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

2568128247 is a deficient number, since it is larger than the sum of its proper divisors (1331504217).

2568128247 is an equidigital number, since it uses as much as digits as its factorization.

2568128247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144861 (or 144849 counting only the distinct ones).

The product of its digits is 430080, while the sum is 45.

The square root of 2568128247 is about 50676.7031978206. The cubic root of 2568128247 is about 1369.4270513431.

The spelling of 2568128247 in words is "two billion, five hundred sixty-eight million, one hundred twenty-eight thousand, two hundred forty-seven".