5671656281 has 2 divisors, whose sum is σ = 5671656282. Its totient is φ = 5671656280.

The previous prime is 5671656257. The next prime is 5671656283. The reversal of 5671656281 is 1826561765.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5496887881 + 174768400 = 74141^2 + 13220^2 .

It is a cyclic number.

It is not a de Polignac number, because 5671656281 - 2⁶ = 5671656217 is a prime.

It is a super-3 number, since 3×5671656281³ (a number of 30 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 5671656283, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (5671656283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2835828140 + 2835828141.

It is an arithmetic number, because the mean of its divisors is an integer number (2835828141).

Almost surely, 2^5671656281 is an apocalyptic number.

It is an amenable number.

5671656281 is a deficient number, since it is larger than the sum of its proper divisors (1).

5671656281 is an equidigital number, since it uses as much as digits as its factorization.

5671656281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 604800, while the sum is 47.

The square root of 5671656281 is about 75310.3995541120. The cubic root of 5671656281 is about 1783.3501986429.

The spelling of 5671656281 in words is "five billion, six hundred seventy-one million, six hundred fifty-six thousand, two hundred eighty-one".