255645907 has 4 divisors (see below), whose sum is σ = 278886456. Its totient is φ = 232405360.

The previous prime is 255645899. The next prime is 255645911. The reversal of 255645907 is 709546552.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 255645907 - 2³ = 255645899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255645917) 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 3 ways as a sum of consecutive naturals, for example, 11620258 + ... + 11620279.

It is an arithmetic number, because the mean of its divisors is an integer number (69721614).

Almost surely, 2^255645907 is an apocalyptic number.

255645907 is a deficient number, since it is larger than the sum of its proper divisors (23240549).

255645907 is a wasteful number, since it uses less digits than its factorization.

255645907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23240548.

The product of its (nonzero) digits is 378000, while the sum is 43.

The square root of 255645907 is about 15988.9307647510. The cubic root of 255645907 is about 634.6675317480.

The spelling of 255645907 in words is "two hundred fifty-five million, six hundred forty-five thousand, nine hundred seven".