2568680381 has 4 divisors (see below), whose sum is σ = 2631331164. Its totient is φ = 2506029600.

The previous prime is 2568680363. The next prime is 2568680383. The reversal of 2568680381 is 1830868652.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45225625 + 2523454756 = 6725^2 + 50234^2 .

It is a cyclic number.

It is not a de Polignac number, because 2568680381 - 2¹⁰ = 2568679357 is a prime.

It is a super-2 number, since 2×2568680381² = 13196237799468610322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2568680383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31325330 + ... + 31325411.

It is an arithmetic number, because the mean of its divisors is an integer number (657832791).

Almost surely, 2^2568680381 is an apocalyptic number.

It is an amenable number.

2568680381 is a deficient number, since it is larger than the sum of its proper divisors (62650783).

2568680381 is an equidigital number, since it uses as much as digits as its factorization.

2568680381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62650782.

The product of its (nonzero) digits is 552960, while the sum is 47.

The square root of 2568680381 is about 50682.1505167253. The cubic root of 2568680381 is about 1369.5251841702.

The spelling of 2568680381 in words is "two billion, five hundred sixty-eight million, six hundred eighty thousand, three hundred eighty-one".