4255643261 has 2 divisors, whose sum is σ = 4255643262. Its totient is φ = 4255643260.

The previous prime is 4255643243. The next prime is 4255643263. The reversal of 4255643261 is 1623465524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3526103161 + 729540100 = 59381^2 + 27010^2 .

It is a cyclic number.

It is not a de Polignac number, because 4255643261 - 2¹⁴ = 4255626877 is a prime.

It is a super-2 number, since 2×4255643261² = 36220999129789428242, which contains 22 as substring.

Together with 4255643263, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4255643263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2127821630 + 2127821631.

It is an arithmetic number, because the mean of its divisors is an integer number (2127821631).

Almost surely, 2^4255643261 is an apocalyptic number.

It is an amenable number.

4255643261 is a deficient number, since it is larger than the sum of its proper divisors (1).

4255643261 is an equidigital number, since it uses as much as digits as its factorization.

4255643261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 172800, while the sum is 38.

The square root of 4255643261 is about 65235.2915299687. The cubic root of 4255643261 is about 1620.5225237421.

The spelling of 4255643261 in words is "four billion, two hundred fifty-five million, six hundred forty-three thousand, two hundred sixty-one".