256264605 has 12 divisors (see below), whose sum is σ = 444192060. Its totient is φ = 136674432.

The previous prime is 256264601. The next prime is 256264607. The reversal of 256264605 is 506462652.

256264605 is a `hidden beast` number, since 2 + 5 + 6 + 2 + 646 + 0 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 112911876 + 143352729 = 10626^2 + 11973^2 .

It is not a de Polignac number, because 256264605 - 2² = 256264601 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 256264605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256264601) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2847340 + ... + 2847429.

It is an arithmetic number, because the mean of its divisors is an integer number (37016005).

Almost surely, 2^256264605 is an apocalyptic number.

It is an amenable number.

256264605 is a deficient number, since it is larger than the sum of its proper divisors (187927455).

256264605 is a wasteful number, since it uses less digits than its factorization.

256264605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5694780 (or 5694777 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 256264605 is about 16008.2667706407. The cubic root of 256264605 is about 635.1791132981.

The spelling of 256264605 in words is "two hundred fifty-six million, two hundred sixty-four thousand, six hundred five".