5646555281 has 2 divisors, whose sum is σ = 5646555282. Its totient is φ = 5646555280.

The previous prime is 5646555251. The next prime is 5646555283. The reversal of 5646555281 is 1825556465.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2828644225 + 2817911056 = 53185^2 + 53084^2 .

It is a cyclic number.

It is not a de Polignac number, because 5646555281 - 2¹⁴ = 5646538897 is a prime.

It is a super-2 number, since 2×5646555281² = 63767173082777977922, which contains 22 as substring.

Together with 5646555283, 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 (5646555283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2823277640 + 2823277641.

It is an arithmetic number, because the mean of its divisors is an integer number (2823277641).

Almost surely, 2^5646555281 is an apocalyptic number.

It is an amenable number.

5646555281 is a deficient number, since it is larger than the sum of its proper divisors (1).

5646555281 is an equidigital number, since it uses as much as digits as its factorization.

5646555281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440000, while the sum is 47.

The square root of 5646555281 is about 75143.5644682896. The cubic root of 5646555281 is about 1780.7154554574.

The spelling of 5646555281 in words is "five billion, six hundred forty-six million, five hundred fifty-five thousand, two hundred eighty-one".