2568346749 has 24 divisors (see below), whose sum is σ = 3941497560. Its totient is φ = 1608501888.

The previous prime is 2568346733. The next prime is 2568346777. The reversal of 2568346749 is 9476438652.

2568346749 is a `hidden beast` number, since 2 + 568 + 3 + 4 + 6 + 74 + 9 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 955922724 + 1612424025 = 30918^2 + 40155^2 .

It is not a de Polignac number, because 2568346749 - 2⁴ = 2568346733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2568346695 and 2568346704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2568346709) 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, 123322 + ... + 142635.

It is an arithmetic number, because the mean of its divisors is an integer number (164229065).

Almost surely, 2^2568346749 is an apocalyptic number.

2568346749 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2568346749 is a deficient number, since it is larger than the sum of its proper divisors (1373150811).

2568346749 is a wasteful number, since it uses less digits than its factorization.

2568346749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266029 (or 266026 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 54.

The square root of 2568346749 is about 50678.8589946538. The cubic root of 2568346749 is about 1369.4658881969.

The spelling of 2568346749 in words is "two billion, five hundred sixty-eight million, three hundred forty-six thousand, seven hundred forty-nine".