5891719681 has 4 divisors (see below), whose sum is σ = 5891874052. Its totient is φ = 5891565312.

The previous prime is 5891719667. The next prime is 5891719693. The reversal of 5891719681 is 1869171985.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1161719056 + 4730000625 = 34084^2 + 68775^2 .

It is a cyclic number.

It is not a de Polignac number, because 5891719681 - 2⁵ = 5891719649 is a prime.

It is a super-2 number, since 2×5891719681² = 69424721598965483522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5891719651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26425 + ... + 111721.

It is an arithmetic number, because the mean of its divisors is an integer number (1472968513).

Almost surely, 2^5891719681 is an apocalyptic number.

It is an amenable number.

5891719681 is a deficient number, since it is larger than the sum of its proper divisors (154371).

5891719681 is an equidigital number, since it uses as much as digits as its factorization.

5891719681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154370.

The product of its digits is 1088640, while the sum is 55.

The square root of 5891719681 is about 76757.5382682379. The cubic root of 5891719681 is about 1806.1231470784.

The spelling of 5891719681 in words is "five billion, eight hundred ninety-one million, seven hundred nineteen thousand, six hundred eighty-one".