5678381581 has 2 divisors, whose sum is σ = 5678381582. Its totient is φ = 5678381580.

The previous prime is 5678381573. The next prime is 5678381711. The reversal of 5678381581 is 1851838765.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4074779556 + 1603602025 = 63834^2 + 40045^2 .

It is a cyclic number.

It is not a de Polignac number, because 5678381581 - 2³ = 5678381573 is a prime.

It is a super-2 number, since 2×5678381581² = 64488034758880119122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5678381881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2839190790 + 2839190791.

It is an arithmetic number, because the mean of its divisors is an integer number (2839190791).

Almost surely, 2^5678381581 is an apocalyptic number.

It is an amenable number.

5678381581 is a deficient number, since it is larger than the sum of its proper divisors (1).

5678381581 is an equidigital number, since it uses as much as digits as its factorization.

5678381581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1612800, while the sum is 52.

The square root of 5678381581 is about 75355.0368654943. The cubic root of 5678381581 is about 1784.0548033807.

The spelling of 5678381581 in words is "five billion, six hundred seventy-eight million, three hundred eighty-one thousand, five hundred eighty-one".