5681551819 has 2 divisors, whose sum is σ = 5681551820. Its totient is φ = 5681551818.

The previous prime is 5681551801. The next prime is 5681551867. The reversal of 5681551819 is 9181551865.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5681551819 - 2¹³ = 5681543627 is a prime.

It is a super-2 number, since 2×5681551819² = 64560062143964417522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (5681551879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2840775909 + 2840775910.

It is an arithmetic number, because the mean of its divisors is an integer number (2840775910).

Almost surely, 2^5681551819 is an apocalyptic number.

5681551819 is a deficient number, since it is larger than the sum of its proper divisors (1).

5681551819 is an equidigital number, since it uses as much as digits as its factorization.

5681551819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432000, while the sum is 49.

The square root of 5681551819 is about 75376.0692726810. The cubic root of 5681551819 is about 1784.3867539562.

The spelling of 5681551819 in words is "five billion, six hundred eighty-one million, five hundred fifty-one thousand, eight hundred nineteen".