255634643 has 6 divisors (see below), whose sum is σ = 280986972. Its totient is φ = 232395020.

The previous prime is 255634619. The next prime is 255634679. The reversal of 255634643 is 346436552.

It is a happy number.

It is not a de Polignac number, because 255634643 - 2¹⁸ = 255372499 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 255634597 and 255634606.

It is not an unprimeable number, because it can be changed into a prime (255634343) 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 in 5 ways as a sum of consecutive naturals, for example, 1056221 + ... + 1056462.

It is an arithmetic number, because the mean of its divisors is an integer number (46831162).

Almost surely, 2^255634643 is an apocalyptic number.

255634643 is a deficient number, since it is larger than the sum of its proper divisors (25352329).

255634643 is a wasteful number, since it uses less digits than its factorization.

255634643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2112705 (or 2112694 counting only the distinct ones).

The product of its digits is 259200, while the sum is 38.

The square root of 255634643 is about 15988.5785171791. The cubic root of 255634643 is about 634.6582102609.

The spelling of 255634643 in words is "two hundred fifty-five million, six hundred thirty-four thousand, six hundred forty-three".