255649775 has 24 divisors (see below), whose sum is σ = 321729408. Its totient is φ = 201500000.

The previous prime is 255649763. The next prime is 255649781. The reversal of 255649775 is 577946552.

It is a happy number.

It is not a de Polignac number, because 255649775 - 2⁴ = 255649759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 821870 + ... + 822180.

It is an arithmetic number, because the mean of its divisors is an integer number (13405392).

Almost surely, 2^255649775 is an apocalyptic number.

255649775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

255649775 is a deficient number, since it is larger than the sum of its proper divisors (66079633).

255649775 is a wasteful number, since it uses less digits than its factorization.

255649775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703 (or 698 counting only the distinct ones).

The product of its digits is 2646000, while the sum is 50.

The square root of 255649775 is about 15989.0517229759. The cubic root of 255649775 is about 634.6707326359.

The spelling of 255649775 in words is "two hundred fifty-five million, six hundred forty-nine thousand, seven hundred seventy-five".